diff --git a/src/crewai/cli/plus_api.py b/src/crewai/cli/plus_api.py
index 4a578ce89..26f0953f0 100644
--- a/src/crewai/cli/plus_api.py
+++ b/src/crewai/cli/plus_api.py
@@ -17,6 +17,7 @@ class PlusAPI:
     ORGANIZATIONS_RESOURCE = "/crewai_plus/api/v1/me/organizations"
     CREWS_RESOURCE = "/crewai_plus/api/v1/crews"
     AGENTS_RESOURCE = "/crewai_plus/api/v1/agents"
+    TRACING_RESOURCE = "/crewai_plus/api/v1/tracing"
 
     def __init__(self, api_key: str) -> None:
         self.api_key = api_key
@@ -114,3 +115,25 @@ class PlusAPI:
 
     def get_organizations(self) -> requests.Response:
         return self._make_request("GET", self.ORGANIZATIONS_RESOURCE)
+
+    def send_trace_batch(self, payload) -> requests.Response:
+        return self._make_request("POST", self.TRACING_RESOURCE, json=payload)
+
+    def initialize_trace_batch(self, payload) -> requests.Response:
+        return self._make_request(
+            "POST", f"{self.TRACING_RESOURCE}/batches", json=payload
+        )
+
+    def send_trace_events(self, trace_batch_id: str, payload) -> requests.Response:
+        return self._make_request(
+            "POST",
+            f"{self.TRACING_RESOURCE}/batches/{trace_batch_id}/events",
+            json=payload,
+        )
+
+    def finalize_trace_batch(self, trace_batch_id: str, payload) -> requests.Response:
+        return self._make_request(
+            "PATCH",
+            f"{self.TRACING_RESOURCE}/batches/{trace_batch_id}/finalize",
+            json=payload,
+        )
diff --git a/src/crewai/crew.py b/src/crewai/crew.py
index 5f7d168ef..3cac711fa 100644
--- a/src/crewai/crew.py
+++ b/src/crewai/crew.py
@@ -1,3 +1,4 @@
+import os
 import asyncio
 import json
 import re
@@ -72,6 +73,11 @@ from crewai.utilities.events.crew_events import (
 )
 from crewai.utilities.events.crewai_event_bus import crewai_event_bus
 from crewai.utilities.events.event_listener import EventListener
+from crewai.utilities.events.listeners.tracing.trace_listener import (
+    TraceCollectionListener,
+)
+
+
 from crewai.utilities.formatter import (
     aggregate_raw_outputs_from_task_outputs,
     aggregate_raw_outputs_from_tasks,
@@ -238,6 +244,10 @@ class Crew(FlowTrackable, BaseModel):
         default_factory=SecurityConfig,
         description="Security configuration for the crew, including fingerprinting.",
     )
+    token_usage: Optional[UsageMetrics] = Field(
+        default=None,
+        description="Metrics for the LLM usage during all tasks execution.",
+    )
 
     @field_validator("id", mode="before")
     @classmethod
@@ -269,6 +279,9 @@ class Crew(FlowTrackable, BaseModel):
 
         self._cache_handler = CacheHandler()
         event_listener = EventListener()
+        if os.getenv("CREWAI_TRACING_ENABLED", "false").lower() == "true":
+            trace_listener = TraceCollectionListener()
+            trace_listener.setup_listeners(crewai_event_bus)
         event_listener.verbose = self.verbose
         event_listener.formatter.verbose = self.verbose
         self._logger = Logger(verbose=self.verbose)
@@ -1044,11 +1057,13 @@ class Crew(FlowTrackable, BaseModel):
 
         final_string_output = final_task_output.raw
         self._finish_execution(final_string_output)
-        token_usage = self.calculate_usage_metrics()
+        self.token_usage = self.calculate_usage_metrics()
         crewai_event_bus.emit(
             self,
             CrewKickoffCompletedEvent(
-                crew_name=self.name, output=final_task_output
+                crew_name=self.name,
+                output=final_task_output,
+                total_tokens=self.token_usage.total_tokens,
             ),
         )
         return CrewOutput(
@@ -1056,7 +1071,7 @@ class Crew(FlowTrackable, BaseModel):
             pydantic=final_task_output.pydantic,
             json_dict=final_task_output.json_dict,
             tasks_output=task_outputs,
-            token_usage=token_usage,
+            token_usage=self.token_usage,
         )
 
     def _process_async_tasks(
@@ -1226,7 +1241,6 @@ class Crew(FlowTrackable, BaseModel):
         if self.external_memory:
             copied_data["external_memory"] = self.external_memory.model_copy(deep=True)
 
-
         copied_data.pop("agents", None)
         copied_data.pop("tasks", None)
 
diff --git a/src/crewai/flow/flow.py b/src/crewai/flow/flow.py
index 9bd9e3b6a..9d75dfe5a 100644
--- a/src/crewai/flow/flow.py
+++ b/src/crewai/flow/flow.py
@@ -2,6 +2,7 @@ import asyncio
 import copy
 import inspect
 import logging
+import os
 from typing import (
     Any,
     Callable,
@@ -32,6 +33,9 @@ from crewai.utilities.events.flow_events import (
     MethodExecutionFinishedEvent,
     MethodExecutionStartedEvent,
 )
+from crewai.utilities.events.listeners.tracing.trace_listener import (
+    TraceCollectionListener,
+)
 from crewai.utilities.printer import Printer
 
 logger = logging.getLogger(__name__)
@@ -465,7 +469,9 @@ class Flow(Generic[T], metaclass=FlowMeta):
 
         # Initialize state with initial values
         self._state = self._create_initial_state()
-
+        if os.getenv("CREWAI_TRACING_ENABLED", "false").lower() == "true":
+            trace_listener = TraceCollectionListener()
+            trace_listener.setup_listeners(crewai_event_bus)
         # Apply any additional kwargs
         if kwargs:
             self._initialize_state(kwargs)
diff --git a/src/crewai/lite_agent.py b/src/crewai/lite_agent.py
index 0e99fb563..2bd85fbe9 100644
--- a/src/crewai/lite_agent.py
+++ b/src/crewai/lite_agent.py
@@ -28,7 +28,7 @@ from pydantic import (
     InstanceOf,
     PrivateAttr,
     model_validator,
-    field_validator
+    field_validator,
 )
 
 from crewai.agents.agent_builder.base_agent import BaseAgent
@@ -210,7 +210,9 @@ class LiteAgent(FlowTrackable, BaseModel):
         """Set up the LLM and other components after initialization."""
         self.llm = create_llm(self.llm)
         if not isinstance(self.llm, BaseLLM):
-            raise ValueError(f"Expected LLM instance of type BaseLLM, got {type(self.llm).__name__}")
+            raise ValueError(
+                f"Expected LLM instance of type BaseLLM, got {type(self.llm).__name__}"
+            )
 
         # Initialize callbacks
         token_callback = TokenCalcHandler(token_cost_process=self._token_process)
@@ -233,7 +235,9 @@ class LiteAgent(FlowTrackable, BaseModel):
             from crewai.tasks.llm_guardrail import LLMGuardrail
 
             if not isinstance(self.llm, BaseLLM):
-                raise TypeError(f"Guardrail requires LLM instance of type BaseLLM, got {type(self.llm).__name__}")
+                raise TypeError(
+                    f"Guardrail requires LLM instance of type BaseLLM, got {type(self.llm).__name__}"
+                )
 
             self._guardrail = LLMGuardrail(description=self.guardrail, llm=self.llm)
 
@@ -515,7 +519,8 @@ class LiteAgent(FlowTrackable, BaseModel):
 
                 enforce_rpm_limit(self.request_within_rpm_limit)
 
-                # Emit LLM call started event
+                llm = cast(LLM, self.llm)
+                model = llm.model if hasattr(llm, "model") else "unknown"
                 crewai_event_bus.emit(
                     self,
                     event=LLMCallStartedEvent(
@@ -523,6 +528,7 @@ class LiteAgent(FlowTrackable, BaseModel):
                         tools=None,
                         callbacks=self._callbacks,
                         from_agent=self,
+                        model=model,
                     ),
                 )
 
@@ -543,6 +549,7 @@ class LiteAgent(FlowTrackable, BaseModel):
                             response=answer,
                             call_type=LLMCallType.LLM_CALL,
                             from_agent=self,
+                            model=model,
                         ),
                     )
                 except Exception as e:
diff --git a/src/crewai/llm.py b/src/crewai/llm.py
index 9296c26de..40c026684 100644
--- a/src/crewai/llm.py
+++ b/src/crewai/llm.py
@@ -61,6 +61,7 @@ load_dotenv()
 
 litellm.suppress_debug_info = True
 
+
 class FilteredStream(io.TextIOBase):
     _lock = None
 
@@ -78,7 +79,8 @@ class FilteredStream(io.TextIOBase):
             # Skip common noisy LiteLLM banners and any other lines that contain "litellm"
             if (
                 "litellm.info:" in lower_s
-                or "Consider using a smaller input or implementing a text splitting strategy" in lower_s
+                or "Consider using a smaller input or implementing a text splitting strategy"
+                in lower_s
             ):
                 return 0
 
@@ -286,6 +288,8 @@ class AccumulatedToolArgs(BaseModel):
 
 
 class LLM(BaseLLM):
+    completion_cost: Optional[float] = None
+
     def __init__(
         self,
         model: str,
@@ -532,7 +536,11 @@ class LLM(BaseLLM):
                     assert hasattr(crewai_event_bus, "emit")
                     crewai_event_bus.emit(
                         self,
-                        event=LLMStreamChunkEvent(chunk=chunk_content, from_task=from_task, from_agent=from_agent),
+                        event=LLMStreamChunkEvent(
+                            chunk=chunk_content,
+                            from_task=from_task,
+                            from_agent=from_agent,
+                        ),
                     )
             # --- 4) Fallback to non-streaming if no content received
             if not full_response.strip() and chunk_count == 0:
@@ -545,7 +553,11 @@ class LLM(BaseLLM):
                     "stream_options", None
                 )  # Remove stream_options for non-streaming call
                 return self._handle_non_streaming_response(
-                    non_streaming_params, callbacks, available_functions, from_task, from_agent
+                    non_streaming_params,
+                    callbacks,
+                    available_functions,
+                    from_task,
+                    from_agent,
                 )
 
             # --- 5) Handle empty response with chunks
@@ -630,7 +642,13 @@ class LLM(BaseLLM):
                 # Log token usage if available in streaming mode
                 self._handle_streaming_callbacks(callbacks, usage_info, last_chunk)
                 # Emit completion event and return response
-                self._handle_emit_call_events(response=full_response, call_type=LLMCallType.LLM_CALL, from_task=from_task, from_agent=from_agent, messages=params["messages"])
+                self._handle_emit_call_events(
+                    response=full_response,
+                    call_type=LLMCallType.LLM_CALL,
+                    from_task=from_task,
+                    from_agent=from_agent,
+                    messages=params["messages"],
+                )
                 return full_response
 
             # --- 9) Handle tool calls if present
@@ -642,7 +660,13 @@ class LLM(BaseLLM):
             self._handle_streaming_callbacks(callbacks, usage_info, last_chunk)
 
             # --- 11) Emit completion event and return response
-            self._handle_emit_call_events(response=full_response, call_type=LLMCallType.LLM_CALL, from_task=from_task, from_agent=from_agent, messages=params["messages"])
+            self._handle_emit_call_events(
+                response=full_response,
+                call_type=LLMCallType.LLM_CALL,
+                from_task=from_task,
+                from_agent=from_agent,
+                messages=params["messages"],
+            )
             return full_response
 
         except ContextWindowExceededError as e:
@@ -654,14 +678,22 @@ class LLM(BaseLLM):
             logging.error(f"Error in streaming response: {str(e)}")
             if full_response.strip():
                 logging.warning(f"Returning partial response despite error: {str(e)}")
-                self._handle_emit_call_events(response=full_response, call_type=LLMCallType.LLM_CALL, from_task=from_task, from_agent=from_agent, messages=params["messages"])
+                self._handle_emit_call_events(
+                    response=full_response,
+                    call_type=LLMCallType.LLM_CALL,
+                    from_task=from_task,
+                    from_agent=from_agent,
+                    messages=params["messages"],
+                )
                 return full_response
 
             # Emit failed event and re-raise the exception
             assert hasattr(crewai_event_bus, "emit")
             crewai_event_bus.emit(
                 self,
-                event=LLMCallFailedEvent(error=str(e), from_task=from_task, from_agent=from_agent),
+                event=LLMCallFailedEvent(
+                    error=str(e), from_task=from_task, from_agent=from_agent
+                ),
             )
             raise Exception(f"Failed to get streaming response: {str(e)}")
 
@@ -779,6 +811,7 @@ class LLM(BaseLLM):
             # across the codebase. This allows CrewAgentExecutor to handle context
             # length issues appropriately.
             response = litellm.completion(**params)
+
         except ContextWindowExceededError as e:
             # Convert litellm's context window error to our own exception type
             # for consistent handling in the rest of the codebase
@@ -805,7 +838,13 @@ class LLM(BaseLLM):
 
         # --- 5) If no tool calls or no available functions, return the text response directly as long as there is a text response
         if (not tool_calls or not available_functions) and text_response:
-            self._handle_emit_call_events(response=text_response, call_type=LLMCallType.LLM_CALL, from_task=from_task, from_agent=from_agent, messages=params["messages"])
+            self._handle_emit_call_events(
+                response=text_response,
+                call_type=LLMCallType.LLM_CALL,
+                from_task=from_task,
+                from_agent=from_agent,
+                messages=params["messages"],
+            )
             return text_response
         # --- 6) If there is no text response, no available functions, but there are tool calls, return the tool calls
         elif tool_calls and not available_functions and not text_response:
@@ -816,7 +855,13 @@ class LLM(BaseLLM):
         if tool_result is not None:
             return tool_result
         # --- 8) If tool call handling didn't return a result, emit completion event and return text response
-        self._handle_emit_call_events(response=text_response, call_type=LLMCallType.LLM_CALL, from_task=from_task, from_agent=from_agent, messages=params["messages"])
+        self._handle_emit_call_events(
+            response=text_response,
+            call_type=LLMCallType.LLM_CALL,
+            from_task=from_task,
+            from_agent=from_agent,
+            messages=params["messages"],
+        )
         return text_response
 
     def _handle_tool_call(
@@ -873,7 +918,9 @@ class LLM(BaseLLM):
                 )
 
                 # --- 3.3) Emit success event
-                self._handle_emit_call_events(response=result, call_type=LLMCallType.TOOL_CALL)
+                self._handle_emit_call_events(
+                    response=result, call_type=LLMCallType.TOOL_CALL
+                )
                 return result
             except Exception as e:
                 # --- 3.4) Handle execution errors
@@ -891,7 +938,7 @@ class LLM(BaseLLM):
                     event=ToolUsageErrorEvent(
                         tool_name=function_name,
                         tool_args=function_args,
-                        error=f"Tool execution error: {str(e)}"
+                        error=f"Tool execution error: {str(e)}",
                     ),
                 )
         return None
@@ -941,6 +988,7 @@ class LLM(BaseLLM):
                 available_functions=available_functions,
                 from_task=from_task,
                 from_agent=from_agent,
+                model=self.model,
             ),
         )
 
@@ -978,17 +1026,22 @@ class LLM(BaseLLM):
                 # whether to summarize the content or abort based on the respect_context_window flag
                 raise
             except Exception as e:
-                unsupported_stop = "Unsupported parameter" in str(e) and "'stop'" in str(e)
+                unsupported_stop = "Unsupported parameter" in str(
+                    e
+                ) and "'stop'" in str(e)
 
                 if unsupported_stop:
-                    if "additional_drop_params" in self.additional_params and isinstance(self.additional_params["additional_drop_params"], list):
+                    if (
+                        "additional_drop_params" in self.additional_params
+                        and isinstance(
+                            self.additional_params["additional_drop_params"], list
+                        )
+                    ):
                         self.additional_params["additional_drop_params"].append("stop")
                     else:
                         self.additional_params = {"additional_drop_params": ["stop"]}
 
-                    logging.info(
-                        "Retrying LLM call without the unsupported 'stop'"
-                    )
+                    logging.info("Retrying LLM call without the unsupported 'stop'")
 
                     return self.call(
                         messages,
@@ -1002,11 +1055,20 @@ class LLM(BaseLLM):
                 assert hasattr(crewai_event_bus, "emit")
                 crewai_event_bus.emit(
                     self,
-                    event=LLMCallFailedEvent(error=str(e), from_task=from_task, from_agent=from_agent),
+                    event=LLMCallFailedEvent(
+                        error=str(e), from_task=from_task, from_agent=from_agent
+                    ),
                 )
                 raise
 
-    def _handle_emit_call_events(self, response: Any, call_type: LLMCallType, from_task: Optional[Any] = None, from_agent: Optional[Any] = None, messages: str | list[dict[str, Any]] | None = None):
+    def _handle_emit_call_events(
+        self,
+        response: Any,
+        call_type: LLMCallType,
+        from_task: Optional[Any] = None,
+        from_agent: Optional[Any] = None,
+        messages: str | list[dict[str, Any]] | None = None,
+    ):
         """Handle the events for the LLM call.
 
         Args:
@@ -1019,7 +1081,14 @@ class LLM(BaseLLM):
         assert hasattr(crewai_event_bus, "emit")
         crewai_event_bus.emit(
             self,
-            event=LLMCallCompletedEvent(messages=messages, response=response, call_type=call_type, from_task=from_task, from_agent=from_agent),
+            event=LLMCallCompletedEvent(
+                messages=messages,
+                response=response,
+                call_type=call_type,
+                from_task=from_task,
+                from_agent=from_agent,
+                model=self.model,
+            ),
         )
 
     def _format_messages_for_provider(
@@ -1074,11 +1143,13 @@ class LLM(BaseLLM):
 
         # TODO: Remove this code after merging PR https://github.com/BerriAI/litellm/pull/10917
         # Ollama doesn't supports last message to be 'assistant'
-        if "ollama" in self.model.lower() and messages and messages[-1]["role"] == "assistant":
+        if (
+            "ollama" in self.model.lower()
+            and messages
+            and messages[-1]["role"] == "assistant"
+        ):
             messages = messages.copy()
-            messages.append(
-                {"role": "user", "content": ""}
-            )
+            messages.append({"role": "user", "content": ""})
             return messages
 
         # Handle Anthropic models
diff --git a/src/crewai/utilities/constants.py b/src/crewai/utilities/constants.py
index 4dbace270..ef66ff87a 100644
--- a/src/crewai/utilities/constants.py
+++ b/src/crewai/utilities/constants.py
@@ -16,3 +16,4 @@ class _NotSpecified:
 # Unlike `None`, which might be a valid value from the user, `NOT_SPECIFIED` allows
 # us to distinguish between "not passed at all" and "explicitly passed None" or "[]".
 NOT_SPECIFIED = _NotSpecified()
+CREWAI_BASE_URL = "https://app.crewai.com/"
diff --git a/src/crewai/utilities/events/crew_events.py b/src/crewai/utilities/events/crew_events.py
index 103f3ecd3..f500ac9cc 100644
--- a/src/crewai/utilities/events/crew_events.py
+++ b/src/crewai/utilities/events/crew_events.py
@@ -47,6 +47,7 @@ class CrewKickoffCompletedEvent(CrewBaseEvent):
 
     output: Any
     type: str = "crew_kickoff_completed"
+    total_tokens: int = 0
 
 
 class CrewKickoffFailedEvent(CrewBaseEvent):
diff --git a/src/crewai/utilities/events/listeners/tracing/interfaces.py b/src/crewai/utilities/events/listeners/tracing/interfaces.py
new file mode 100644
index 000000000..4516be7f8
--- /dev/null
+++ b/src/crewai/utilities/events/listeners/tracing/interfaces.py
@@ -0,0 +1,33 @@
+import json
+from datetime import datetime
+
+from crewai.cli.plus_api import PlusAPI
+from crewai.cli.authentication.token import get_auth_token
+from pydantic import BaseModel
+from .trace_batch_manager import TraceBatch
+from logging import getLogger
+
+logger = getLogger(__name__)
+
+
+class TraceSender(BaseModel):
+    """Trace sender for sending trace batches to the backend"""
+
+    def send_batch(self, batch: TraceBatch) -> bool:
+        """Print trace batch to console"""
+        try:
+            payload = batch.to_dict()
+
+            def datetime_handler(obj):
+                if isinstance(obj, datetime):
+                    return obj.isoformat()
+
+            serialized_payload = json.loads(
+                json.dumps(payload, default=datetime_handler)
+            )
+
+            PlusAPI(api_key=get_auth_token()).send_trace_batch(serialized_payload)
+            return True
+        except Exception as e:
+            logger.error(f"Error sending trace batch: {e}")
+            return False
diff --git a/src/crewai/utilities/events/listeners/tracing/trace_batch_manager.py b/src/crewai/utilities/events/listeners/tracing/trace_batch_manager.py
new file mode 100644
index 000000000..d014c65d2
--- /dev/null
+++ b/src/crewai/utilities/events/listeners/tracing/trace_batch_manager.py
@@ -0,0 +1,252 @@
+import uuid
+from datetime import datetime, timezone
+from typing import Dict, List, Any, Optional
+from dataclasses import dataclass, field
+
+from crewai.utilities.constants import CREWAI_BASE_URL
+from crewai.cli.authentication.token import get_auth_token
+
+from crewai.cli.version import get_crewai_version
+from crewai.cli.plus_api import PlusAPI
+from rich.console import Console
+from rich.panel import Panel
+
+from crewai.utilities.events.listeners.tracing.types import TraceEvent
+from logging import getLogger
+
+logger = getLogger(__name__)
+
+
+@dataclass
+class TraceBatch:
+    """Batch of events to send to backend"""
+
+    version: str = field(default_factory=get_crewai_version)
+    batch_id: str = field(default_factory=lambda: str(uuid.uuid4()))
+    user_context: Dict[str, str] = field(default_factory=dict)
+    execution_metadata: Dict[str, Any] = field(default_factory=dict)
+    events: List[TraceEvent] = field(default_factory=list)
+
+    def to_dict(self) -> Dict[str, Any]:
+        return {
+            "version": self.version,
+            "batch_id": self.batch_id,
+            "user_context": self.user_context,
+            "execution_metadata": self.execution_metadata,
+            "events": [event.to_dict() for event in self.events],
+        }
+
+
+class TraceBatchManager:
+    """Single responsibility: Manage batches and event buffering"""
+
+    def __init__(self):
+        self.plus_api = PlusAPI(api_key=get_auth_token())
+        self.trace_batch_id: Optional[str] = None  # Backend ID
+        self.current_batch: Optional[TraceBatch] = None
+        self.event_buffer: List[TraceEvent] = []
+        self.execution_start_times: Dict[str, datetime] = {}
+
+    def initialize_batch(
+        self, user_context: Dict[str, str], execution_metadata: Dict[str, Any]
+    ) -> TraceBatch:
+        """Initialize a new trace batch"""
+        self.current_batch = TraceBatch(
+            user_context=user_context, execution_metadata=execution_metadata
+        )
+        self.event_buffer.clear()
+
+        self.record_start_time("execution")
+
+        self._initialize_backend_batch(user_context, execution_metadata)
+
+        return self.current_batch
+
+    def _initialize_backend_batch(
+        self, user_context: Dict[str, str], execution_metadata: Dict[str, Any]
+    ):
+        """Send batch initialization to backend"""
+        if not self.plus_api or not self.current_batch:
+            return
+
+        try:
+            payload = {
+                "trace_id": self.current_batch.batch_id,
+                "execution_type": execution_metadata.get("execution_type", "crew"),
+                "execution_context": {
+                    "crew_fingerprint": execution_metadata.get("crew_fingerprint"),
+                    "crew_name": execution_metadata.get("crew_name", "Unknown Crew"),
+                    "flow_name": execution_metadata.get("flow_name", "Unknown Flow"),
+                    "crewai_version": self.current_batch.version,
+                    "privacy_level": user_context.get("privacy_level", "standard"),
+                },
+                "execution_metadata": {
+                    "expected_duration_estimate": execution_metadata.get(
+                        "expected_duration_estimate", 300
+                    ),
+                    "agent_count": execution_metadata.get("agent_count", 0),
+                    "task_count": execution_metadata.get("task_count", 0),
+                    "flow_method_count": execution_metadata.get("flow_method_count", 0),
+                    "execution_started_at": datetime.now(timezone.utc).isoformat(),
+                },
+            }
+
+            response = self.plus_api.initialize_trace_batch(payload)
+
+            if response.status_code == 201 or response.status_code == 200:
+                response_data = response.json()
+                self.trace_batch_id = response_data["trace_id"]
+                console = Console()
+                panel = Panel(
+                    f"✅ Trace batch initialized with session ID: {self.trace_batch_id}",
+                    title="Trace Batch Initialization",
+                    border_style="green",
+                )
+                console.print(panel)
+            else:
+                logger.error(
+                    f"❌ Failed to initialize trace batch: {response.status_code} - {response.text}"
+                )
+
+        except Exception as e:
+            logger.error(f"❌ Error initializing trace batch: {str(e)}")
+
+    def add_event(self, trace_event: TraceEvent):
+        """Add event to buffer"""
+        self.event_buffer.append(trace_event)
+
+    def _send_events_to_backend(self):
+        """Send buffered events to backend"""
+        if not self.plus_api or not self.trace_batch_id or not self.event_buffer:
+            return
+
+        try:
+            payload = {
+                "events": [event.to_dict() for event in self.event_buffer],
+                "batch_metadata": {
+                    "events_count": len(self.event_buffer),
+                    "batch_sequence": 1,
+                    "is_final_batch": False,
+                },
+            }
+
+            if not self.trace_batch_id:
+                raise Exception("❌ Trace batch ID not found")
+
+            response = self.plus_api.send_trace_events(self.trace_batch_id, payload)
+
+            if response.status_code == 200 or response.status_code == 201:
+                self.event_buffer.clear()
+            else:
+                logger.error(
+                    f"❌ Failed to send events: {response.status_code} - {response.text}"
+                )
+
+        except Exception as e:
+            logger.error(f"❌ Error sending events to backend: {str(e)}")
+
+    def finalize_batch(self) -> Optional[TraceBatch]:
+        """Finalize batch and return it for sending"""
+        if not self.current_batch:
+            return None
+
+        if self.event_buffer:
+            self._send_events_to_backend()
+
+        self._finalize_backend_batch()
+
+        self.current_batch.events = self.event_buffer.copy()
+
+        finalized_batch = self.current_batch
+
+        self.current_batch = None
+        self.event_buffer.clear()
+        self.trace_batch_id = None
+
+        self._cleanup_batch_data()
+
+        return finalized_batch
+
+    def _finalize_backend_batch(self):
+        """Send batch finalization to backend"""
+        if not self.plus_api or not self.trace_batch_id:
+            return
+
+        try:
+            total_events = len(self.current_batch.events) if self.current_batch else 0
+
+            payload = {
+                "status": "completed",
+                "duration_ms": self.calculate_duration("execution"),
+                "final_event_count": total_events,
+            }
+
+            response = self.plus_api.finalize_trace_batch(self.trace_batch_id, payload)
+
+            if response.status_code == 200:
+                console = Console()
+                panel = Panel(
+                    f"✅ Trace batch finalized with session ID: {self.trace_batch_id}. View here: {CREWAI_BASE_URL}/crewai_plus/trace_batches/{self.trace_batch_id}",
+                    title="Trace Batch Finalization",
+                    border_style="green",
+                )
+                console.print(panel)
+
+            else:
+                logger.error(
+                    f"❌ Failed to finalize trace batch: {response.status_code} - {response.text}"
+                )
+
+        except Exception as e:
+            logger.error(f"❌ Error finalizing trace batch: {str(e)}")
+            # TODO: send error to app
+
+    def _cleanup_batch_data(self):
+        """Clean up batch data after successful finalization to free memory"""
+        try:
+            if hasattr(self, "event_buffer") and self.event_buffer:
+                self.event_buffer.clear()
+
+            if hasattr(self, "current_batch") and self.current_batch:
+                if hasattr(self.current_batch, "events") and self.current_batch.events:
+                    self.current_batch.events.clear()
+                self.current_batch = None
+
+            if hasattr(self, "batch_sequence"):
+                self.batch_sequence = 0
+
+        except Exception as e:
+            logger.error(f"Warning: Error during cleanup: {str(e)}")
+
+    def has_events(self) -> bool:
+        """Check if there are events in the buffer"""
+        return len(self.event_buffer) > 0
+
+    def get_event_count(self) -> int:
+        """Get number of events in buffer"""
+        return len(self.event_buffer)
+
+    def is_batch_initialized(self) -> bool:
+        """Check if batch is initialized"""
+        return self.current_batch is not None
+
+    def record_start_time(self, key: str):
+        """Record start time for duration calculation"""
+        self.execution_start_times[key] = datetime.now(timezone.utc)
+
+    def calculate_duration(self, key: str) -> int:
+        """Calculate duration in milliseconds from recorded start time"""
+        start_time = self.execution_start_times.get(key)
+        if start_time:
+            duration_ms = int(
+                (datetime.now(timezone.utc) - start_time).total_seconds() * 1000
+            )
+            del self.execution_start_times[key]
+            return duration_ms
+        return 0
+
+    def get_trace_id(self) -> Optional[str]:
+        """Get current trace ID"""
+        if self.current_batch:
+            return self.current_batch.user_context.get("trace_id")
+        return None
diff --git a/src/crewai/utilities/events/listeners/tracing/trace_listener.py b/src/crewai/utilities/events/listeners/tracing/trace_listener.py
new file mode 100644
index 000000000..de262ff5b
--- /dev/null
+++ b/src/crewai/utilities/events/listeners/tracing/trace_listener.py
@@ -0,0 +1,414 @@
+import os
+import uuid
+
+from typing import Dict, Any, Optional
+
+from crewai.utilities.events.base_event_listener import BaseEventListener
+from crewai.utilities.events.agent_events import (
+    AgentExecutionCompletedEvent,
+    AgentExecutionStartedEvent,
+    LiteAgentExecutionStartedEvent,
+    LiteAgentExecutionCompletedEvent,
+    LiteAgentExecutionErrorEvent,
+    AgentExecutionErrorEvent,
+)
+from crewai.utilities.events.listeners.tracing.types import TraceEvent
+from crewai.utilities.events.reasoning_events import (
+    AgentReasoningStartedEvent,
+    AgentReasoningCompletedEvent,
+    AgentReasoningFailedEvent,
+)
+from crewai.utilities.events.crew_events import (
+    CrewKickoffCompletedEvent,
+    CrewKickoffFailedEvent,
+    CrewKickoffStartedEvent,
+)
+from crewai.utilities.events.task_events import (
+    TaskCompletedEvent,
+    TaskFailedEvent,
+    TaskStartedEvent,
+)
+from crewai.utilities.events.tool_usage_events import (
+    ToolUsageErrorEvent,
+    ToolUsageFinishedEvent,
+    ToolUsageStartedEvent,
+)
+from crewai.utilities.events.llm_events import (
+    LLMCallCompletedEvent,
+    LLMCallFailedEvent,
+    LLMCallStartedEvent,
+)
+
+from crewai.utilities.events.flow_events import (
+    FlowCreatedEvent,
+    FlowStartedEvent,
+    FlowFinishedEvent,
+    MethodExecutionStartedEvent,
+    MethodExecutionFinishedEvent,
+    MethodExecutionFailedEvent,
+    FlowPlotEvent,
+)
+from crewai.utilities.events.llm_guardrail_events import (
+    LLMGuardrailStartedEvent,
+    LLMGuardrailCompletedEvent,
+)
+from crewai.utilities.serialization import to_serializable
+
+
+from .trace_batch_manager import TraceBatchManager
+
+from crewai.utilities.events.memory_events import (
+    MemoryQueryStartedEvent,
+    MemoryQueryCompletedEvent,
+    MemoryQueryFailedEvent,
+    MemorySaveStartedEvent,
+    MemorySaveCompletedEvent,
+    MemorySaveFailedEvent,
+)
+from .interfaces import TraceSender
+from crewai.cli.authentication.token import get_auth_token
+from crewai.cli.version import get_crewai_version
+
+
+class TraceCollectionListener(BaseEventListener):
+    """
+    Trace collection listener that orchestrates trace collection
+    """
+
+    trace_enabled: bool = False
+    complex_events = ["task_started", "llm_call_started", "llm_call_completed"]
+
+    _instance = None
+    _initialized = False
+
+    def __new__(cls, batch_manager=None, trace_sender=None):
+        if cls._instance is None:
+            cls._instance = super().__new__(cls)
+        return cls._instance
+
+    def __init__(
+        self,
+        batch_manager: Optional[TraceBatchManager] = None,
+        trace_sender: Optional[TraceSender] = None,
+    ):
+        if self._initialized:
+            return
+
+        super().__init__()
+        self.batch_manager = batch_manager or TraceBatchManager()
+        self.trace_sender = trace_sender or TraceSender()
+        self.trace_enabled = self._check_trace_enabled()
+        self._initialized = True
+
+    def _check_trace_enabled(self) -> bool:
+        """Check if tracing should be enabled"""
+        auth_token = get_auth_token()
+        if not auth_token:
+            return False
+
+        return os.getenv("CREWAI_TRACING_ENABLED", "false").lower() == "true" or bool(
+            os.getenv("CREWAI_USER_TOKEN")
+        )
+
+    def _get_user_context(self) -> Dict[str, str]:
+        """Extract user context for tracing"""
+        return {
+            "user_id": os.getenv("CREWAI_USER_ID", "anonymous"),
+            "organization_id": os.getenv("CREWAI_ORG_ID", ""),
+            "session_id": str(uuid.uuid4()),
+            "trace_id": str(uuid.uuid4()),
+        }
+
+    def setup_listeners(self, crewai_event_bus):
+        """Setup event listeners - delegates to specific handlers"""
+        if not self.trace_enabled:
+            return
+
+        self._register_flow_event_handlers(crewai_event_bus)
+        self._register_context_event_handlers(crewai_event_bus)
+        self._register_action_event_handlers(crewai_event_bus)
+
+    def _register_flow_event_handlers(self, event_bus):
+        """Register handlers for flow events"""
+
+        @event_bus.on(FlowCreatedEvent)
+        def on_flow_created(source, event):
+            pass
+
+        @event_bus.on(FlowStartedEvent)
+        def on_flow_started(source, event):
+            if not self.batch_manager.is_batch_initialized():
+                self._initialize_flow_batch(source, event)
+            self._handle_trace_event("flow_started", source, event)
+
+        @event_bus.on(MethodExecutionStartedEvent)
+        def on_method_started(source, event):
+            self._handle_trace_event("method_execution_started", source, event)
+
+        @event_bus.on(MethodExecutionFinishedEvent)
+        def on_method_finished(source, event):
+            self._handle_trace_event("method_execution_finished", source, event)
+
+        @event_bus.on(MethodExecutionFailedEvent)
+        def on_method_failed(source, event):
+            self._handle_trace_event("method_execution_failed", source, event)
+
+        @event_bus.on(FlowFinishedEvent)
+        def on_flow_finished(source, event):
+            self._handle_trace_event("flow_finished", source, event)
+            self._send_batch()
+
+        @event_bus.on(FlowPlotEvent)
+        def on_flow_plot(source, event):
+            self._handle_action_event("flow_plot", source, event)
+
+    def _register_context_event_handlers(self, event_bus):
+        """Register handlers for context events (start/end)"""
+
+        @event_bus.on(CrewKickoffStartedEvent)
+        def on_crew_started(source, event):
+            if not self.batch_manager.is_batch_initialized():
+                self._initialize_batch(source, event)
+            self._handle_trace_event("crew_kickoff_started", source, event)
+
+        @event_bus.on(CrewKickoffCompletedEvent)
+        def on_crew_completed(source, event):
+            self._handle_trace_event("crew_kickoff_completed", source, event)
+            self._send_batch()
+
+        @event_bus.on(CrewKickoffFailedEvent)
+        def on_crew_failed(source, event):
+            self._handle_trace_event("crew_kickoff_failed", source, event)
+            self._send_batch()
+
+        @event_bus.on(TaskStartedEvent)
+        def on_task_started(source, event):
+            self._handle_trace_event("task_started", source, event)
+
+        @event_bus.on(TaskCompletedEvent)
+        def on_task_completed(source, event):
+            self._handle_trace_event("task_completed", source, event)
+
+        @event_bus.on(TaskFailedEvent)
+        def on_task_failed(source, event):
+            self._handle_trace_event("task_failed", source, event)
+
+        @event_bus.on(AgentExecutionStartedEvent)
+        def on_agent_started(source, event):
+            self._handle_trace_event("agent_execution_started", source, event)
+
+        @event_bus.on(AgentExecutionCompletedEvent)
+        def on_agent_completed(source, event):
+            self._handle_trace_event("agent_execution_completed", source, event)
+
+        @event_bus.on(LiteAgentExecutionStartedEvent)
+        def on_lite_agent_started(source, event):
+            self._handle_trace_event("lite_agent_execution_started", source, event)
+
+        @event_bus.on(LiteAgentExecutionCompletedEvent)
+        def on_lite_agent_completed(source, event):
+            self._handle_trace_event("lite_agent_execution_completed", source, event)
+
+        @event_bus.on(LiteAgentExecutionErrorEvent)
+        def on_lite_agent_error(source, event):
+            self._handle_trace_event("lite_agent_execution_error", source, event)
+
+        @event_bus.on(AgentExecutionErrorEvent)
+        def on_agent_error(source, event):
+            self._handle_trace_event("agent_execution_error", source, event)
+
+        @event_bus.on(LLMGuardrailStartedEvent)
+        def on_guardrail_started(source, event):
+            self._handle_trace_event("llm_guardrail_started", source, event)
+
+        @event_bus.on(LLMGuardrailCompletedEvent)
+        def on_guardrail_completed(source, event):
+            self._handle_trace_event("llm_guardrail_completed", source, event)
+
+    def _register_action_event_handlers(self, event_bus):
+        """Register handlers for action events (LLM calls, tool usage, memory)"""
+
+        @event_bus.on(LLMCallStartedEvent)
+        def on_llm_call_started(source, event):
+            self._handle_action_event("llm_call_started", source, event)
+
+        @event_bus.on(LLMCallCompletedEvent)
+        def on_llm_call_completed(source, event):
+            self._handle_action_event("llm_call_completed", source, event)
+
+        @event_bus.on(LLMCallFailedEvent)
+        def on_llm_call_failed(source, event):
+            self._handle_action_event("llm_call_failed", source, event)
+
+        @event_bus.on(ToolUsageStartedEvent)
+        def on_tool_started(source, event):
+            self._handle_action_event("tool_usage_started", source, event)
+
+        @event_bus.on(ToolUsageFinishedEvent)
+        def on_tool_finished(source, event):
+            self._handle_action_event("tool_usage_finished", source, event)
+
+        @event_bus.on(ToolUsageErrorEvent)
+        def on_tool_error(source, event):
+            self._handle_action_event("tool_usage_error", source, event)
+
+        @event_bus.on(MemoryQueryStartedEvent)
+        def on_memory_query_started(source, event):
+            self._handle_action_event("memory_query_started", source, event)
+
+        @event_bus.on(MemoryQueryCompletedEvent)
+        def on_memory_query_completed(source, event):
+            self._handle_action_event("memory_query_completed", source, event)
+
+        @event_bus.on(MemoryQueryFailedEvent)
+        def on_memory_query_failed(source, event):
+            self._handle_action_event("memory_query_failed", source, event)
+
+        @event_bus.on(MemorySaveStartedEvent)
+        def on_memory_save_started(source, event):
+            self._handle_action_event("memory_save_started", source, event)
+
+        @event_bus.on(MemorySaveCompletedEvent)
+        def on_memory_save_completed(source, event):
+            self._handle_action_event("memory_save_completed", source, event)
+
+        @event_bus.on(MemorySaveFailedEvent)
+        def on_memory_save_failed(source, event):
+            self._handle_action_event("memory_save_failed", source, event)
+
+        @event_bus.on(AgentReasoningStartedEvent)
+        def on_agent_reasoning_started(source, event):
+            self._handle_action_event("agent_reasoning_started", source, event)
+
+        @event_bus.on(AgentReasoningCompletedEvent)
+        def on_agent_reasoning_completed(source, event):
+            self._handle_action_event("agent_reasoning_completed", source, event)
+
+        @event_bus.on(AgentReasoningFailedEvent)
+        def on_agent_reasoning_failed(source, event):
+            self._handle_action_event("agent_reasoning_failed", source, event)
+
+    def _initialize_batch(self, source: Any, event: Any):
+        """Initialize trace batch"""
+        user_context = self._get_user_context()
+        execution_metadata = {
+            "crew_name": getattr(event, "crew_name", "Unknown Crew"),
+            "execution_start": event.timestamp if hasattr(event, "timestamp") else None,
+            "crewai_version": get_crewai_version(),
+        }
+
+        self.batch_manager.initialize_batch(user_context, execution_metadata)
+
+    def _initialize_flow_batch(self, source: Any, event: Any):
+        """Initialize trace batch for Flow execution"""
+        user_context = self._get_user_context()
+        execution_metadata = {
+            "flow_name": getattr(source, "__class__.__name__", "Unknown Flow"),
+            "execution_start": event.timestamp if hasattr(event, "timestamp") else None,
+            "crewai_version": get_crewai_version(),
+            "execution_type": "flow",
+        }
+
+        self.batch_manager.initialize_batch(user_context, execution_metadata)
+
+    def _handle_trace_event(self, event_type: str, source: Any, event: Any):
+        """Generic handler for context end events"""
+
+        trace_event = self._create_trace_event(event_type, source, event)
+
+        self.batch_manager.add_event(trace_event)
+
+    def _handle_action_event(self, event_type: str, source: Any, event: Any):
+        """Generic handler for action events (LLM calls, tool usage)"""
+
+        if not self.batch_manager.is_batch_initialized():
+            user_context = self._get_user_context()
+            execution_metadata = {
+                "crew_name": getattr(source, "name", "Unknown Crew"),
+                "crewai_version": get_crewai_version(),
+            }
+            self.batch_manager.initialize_batch(user_context, execution_metadata)
+
+        trace_event = self._create_trace_event(event_type, source, event)
+        self.batch_manager.add_event(trace_event)
+
+    def _send_batch(self):
+        """Send finalized batch using the configured sender"""
+        batch = self.batch_manager.finalize_batch()
+        if batch:
+            success = self.trace_sender.send_batch(batch)
+            if not success:
+                print("⚠️  Failed to send trace batch")
+
+    def _create_trace_event(
+        self, event_type: str, source: Any, event: Any
+    ) -> TraceEvent:
+        """Create a trace event"""
+        trace_event = TraceEvent(
+            type=event_type,
+        )
+
+        trace_event.event_data = self._build_event_data(event_type, event, source)
+        return trace_event
+
+    def _build_event_data(
+        self, event_type: str, event: Any, source: Any
+    ) -> Dict[str, Any]:
+        """Build event data"""
+        if event_type not in self.complex_events:
+            return self._safe_serialize_to_dict(event)
+        elif event_type == "task_started":
+            return {
+                "task_description": event.task.description,
+                "task_name": event.task.name,
+                "context": event.context,
+                "agent": source.agent.role,
+            }
+        elif event_type == "llm_call_started":
+            return {
+                **self._safe_serialize_to_dict(event),
+                "messages": self._truncate_messages(event.messages),
+            }
+        elif event_type == "llm_call_completed":
+            return {
+                **self._safe_serialize_to_dict(event),
+                "messages": self._truncate_messages(event.messages),
+            }
+        else:
+            return {
+                "event_type": event_type,
+                "event": self._safe_serialize_to_dict(event),
+                "source": source,
+            }
+
+    # TODO: move to utils
+    def _safe_serialize_to_dict(
+        self, obj, exclude: set[str] | None = None
+    ) -> Dict[str, Any]:
+        """Safely serialize an object to a dictionary for event data."""
+        try:
+            serialized = to_serializable(obj, exclude)
+            if isinstance(serialized, dict):
+                return serialized
+            else:
+                return {"serialized_data": serialized}
+        except Exception as e:
+            return {"serialization_error": str(e), "object_type": type(obj).__name__}
+
+    # TODO: move to utils
+    def _truncate_messages(self, messages, max_content_length=200, max_messages=5):
+        """Truncate message content and limit number of messages"""
+        if not messages or not isinstance(messages, list):
+            return messages
+
+        # Limit number of messages
+        limited_messages = messages[:max_messages]
+
+        # Truncate each message content
+        for msg in limited_messages:
+            if isinstance(msg, dict) and "content" in msg:
+                content = msg["content"]
+                if len(content) > max_content_length:
+                    msg["content"] = content[:max_content_length] + "..."
+
+        return limited_messages
diff --git a/src/crewai/utilities/events/listeners/tracing/types.py b/src/crewai/utilities/events/listeners/tracing/types.py
new file mode 100644
index 000000000..7c9955384
--- /dev/null
+++ b/src/crewai/utilities/events/listeners/tracing/types.py
@@ -0,0 +1,19 @@
+from dataclasses import dataclass, field, asdict
+from datetime import datetime, timezone
+from typing import Dict, Any
+import uuid
+
+
+@dataclass
+class TraceEvent:
+    """Individual trace event payload"""
+
+    event_id: str = field(default_factory=lambda: str(uuid.uuid4()))
+    timestamp: str = field(
+        default_factory=lambda: datetime.now(timezone.utc).isoformat()
+    )
+    type: str = ""
+    event_data: Dict[str, Any] = field(default_factory=dict)
+
+    def to_dict(self) -> Dict[str, Any]:
+        return asdict(self)
diff --git a/src/crewai/utilities/events/llm_events.py b/src/crewai/utilities/events/llm_events.py
index 74101a041..b0518c1a0 100644
--- a/src/crewai/utilities/events/llm_events.py
+++ b/src/crewai/utilities/events/llm_events.py
@@ -5,6 +5,7 @@ from pydantic import BaseModel
 
 from crewai.utilities.events.base_events import BaseEvent
 
+
 class LLMEventBase(BaseEvent):
     task_name: Optional[str] = None
     task_id: Optional[str] = None
@@ -32,6 +33,7 @@ class LLMEventBase(BaseEvent):
             self.task_id = task.id
             self.task_name = task.name
 
+
 class LLMCallType(Enum):
     """Type of LLM call being made"""
 
@@ -48,6 +50,7 @@ class LLMCallStartedEvent(LLMEventBase):
     """
 
     type: str = "llm_call_started"
+    model: Optional[str] = None
     messages: Optional[Union[str, List[Dict[str, Any]]]] = None
     tools: Optional[List[dict[str, Any]]] = None
     callbacks: Optional[List[Any]] = None
@@ -61,6 +64,8 @@ class LLMCallCompletedEvent(LLMEventBase):
     messages: str | list[dict[str, Any]] | None = None
     response: Any
     call_type: LLMCallType
+    model: Optional[str] = None
+
 
 class LLMCallFailedEvent(LLMEventBase):
     """Event emitted when a LLM call fails"""
diff --git a/tests/cassettes/TestTraceListenerSetup.test_batch_manager_finalizes_batch_clears_buffer.yaml b/tests/cassettes/TestTraceListenerSetup.test_batch_manager_finalizes_batch_clears_buffer.yaml
new file mode 100644
index 000000000..7ff3d14f8
--- /dev/null
+++ b/tests/cassettes/TestTraceListenerSetup.test_batch_manager_finalizes_batch_clears_buffer.yaml
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       accept-encoding:
-      - gzip, deflate
+      - gzip, deflate, zstd
       connection:
       - keep-alive
       content-length:
@@ -16,19 +16,19 @@ interactions:
       host:
       - generativelanguage.googleapis.com
       user-agent:
-      - litellm/1.60.2
+      - litellm/1.74.9
     method: POST
     uri: https://generativelanguage.googleapis.com/v1beta/models/gemma-3-27b-it:generateContent
   response:
     body:
       string: !!binary |
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-        aB11YqyxLOVoMrq6+R4Ri2Af/AEDrXcbkQIAAA==
+        H4sIAAAAAAAC/21RwWrbQBC96yuGvRSMFYp7aOktxAnY1MQ0ahtIfJhII3vwalfZGdUpxv/elRQ5
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+        WvAl3AR0OQELTCZrDCyTyQU8uke30E8Ce+cPDkofgOO9nIONL6sw7AUs7wk0il1zWZKFzB8oTDvk
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+        z5vp2zCCt9Q6rXxBdqCfBoIp2bHsfhKKdy3tLrtdm3OVXUEvEf6cDBd00qYR3NKKFGMseB6+qUP0
+        opnfk7vyTRfLt17LqI8j/rAyapJ5lGQ7zm4Ua3SAlvVfl9v1fWZGLvWd8uCy2zfJq99+BL8pCPde
+        t1RVmH5JZ1+fUtZOzgSS2juhRdEylvgnw+VTMU/T5bPKmos7nV3+Mskp+Q+x/LCbmwIAAA==
     headers:
       Alt-Svc:
       - h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
@@ -37,11 +37,11 @@ interactions:
       Content-Type:
       - application/json; charset=UTF-8
       Date:
-      - Tue, 22 Apr 2025 14:25:41 GMT
+      - Wed, 06 Aug 2025 18:55:33 GMT
       Server:
       - scaffolding on HTTPServer2
       Server-Timing:
-      - gfet4t7; dur=2447
+      - gfet4t7; dur=1529
       Transfer-Encoding:
       - chunked
       Vary:
diff --git a/tests/cassettes/test_gemma3[gemini-gemma-3-4b-it].yaml b/tests/cassettes/test_gemma3[gemini-gemma-3-4b-it].yaml
deleted file mode 100644
index d5680b6d2..000000000
--- a/tests/cassettes/test_gemma3[gemini-gemma-3-4b-it].yaml
+++ /dev/null
@@ -1,60 +0,0 @@
-interactions:
-- request:
-    body: '{"contents": [{"role": "user", "parts": [{"text": "What is the capital
-      of France?"}]}], "generationConfig": {"stop_sequences": []}}'
-    headers:
-      accept:
-      - '*/*'
-      accept-encoding:
-      - gzip, deflate
-      connection:
-      - keep-alive
-      content-length:
-      - '131'
-      content-type:
-      - application/json
-      host:
-      - generativelanguage.googleapis.com
-      user-agent:
-      - litellm/1.60.2
-    method: POST
-    uri: https://generativelanguage.googleapis.com/v1beta/models/gemma-3-4b-it:generateContent
-  response:
-    body:
-      string: !!binary |
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-        11sYGRUFDkaD8WygRUXr6BcxmBLccwIAAA==
-    headers:
-      Alt-Svc:
-      - h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
-      Content-Encoding:
-      - gzip
-      Content-Type:
-      - application/json; charset=UTF-8
-      Date:
-      - Tue, 22 Apr 2025 14:25:35 GMT
-      Server:
-      - scaffolding on HTTPServer2
-      Server-Timing:
-      - gfet4t7; dur=2349
-      Transfer-Encoding:
-      - chunked
-      Vary:
-      - Origin
-      - X-Origin
-      - Referer
-      X-Content-Type-Options:
-      - nosniff
-      X-Frame-Options:
-      - SAMEORIGIN
-      X-XSS-Protection:
-      - '0'
-    status:
-      code: 200
-      message: OK
-version: 1
diff --git a/tests/llm_test.py b/tests/llm_test.py
index fb78c4774..20f1d8108 100644
--- a/tests/llm_test.py
+++ b/tests/llm_test.py
@@ -282,9 +282,6 @@ def test_gemini_models(model):
 @pytest.mark.parametrize(
     "model",
     [
-        "gemini/gemma-3-1b-it",
-        "gemini/gemma-3-4b-it",
-        "gemini/gemma-3-12b-it",
         "gemini/gemma-3-27b-it",
     ],
 )
@@ -377,6 +374,7 @@ def get_weather_tool_schema():
         },
     }
 
+
 def test_context_window_exceeded_error_handling():
     """Test that litellm.ContextWindowExceededError is converted to LLMContextLengthExceededException."""
     from litellm.exceptions import ContextWindowExceededError
@@ -392,7 +390,7 @@ def test_context_window_exceeded_error_handling():
         mock_completion.side_effect = ContextWindowExceededError(
             "This model's maximum context length is 8192 tokens. However, your messages resulted in 10000 tokens.",
             model="gpt-4",
-            llm_provider="openai"
+            llm_provider="openai",
         )
 
         with pytest.raises(LLMContextLengthExceededException) as excinfo:
@@ -407,7 +405,7 @@ def test_context_window_exceeded_error_handling():
         mock_completion.side_effect = ContextWindowExceededError(
             "This model's maximum context length is 8192 tokens. However, your messages resulted in 10000 tokens.",
             model="gpt-4",
-            llm_provider="openai"
+            llm_provider="openai",
         )
 
         with pytest.raises(LLMContextLengthExceededException) as excinfo:
@@ -598,6 +596,7 @@ def test_handle_streaming_tool_calls(get_weather_tool_schema, mock_emit):
         expected_final_chunk_result=expected_final_chunk_result,
     )
 
+
 @pytest.mark.vcr(filter_headers=["authorization"])
 def test_handle_streaming_tool_calls_with_error(get_weather_tool_schema, mock_emit):
     def get_weather_error(location):
@@ -609,9 +608,7 @@ def test_handle_streaming_tool_calls_with_error(get_weather_tool_schema, mock_em
             {"role": "user", "content": "What is the weather in New York?"},
         ],
         tools=[get_weather_tool_schema],
-        available_functions={
-            "get_weather": get_weather_error
-        },
+        available_functions={"get_weather": get_weather_error},
     )
     assert response == ""
     expected_final_chunk_result = '{"location":"New York, NY"}'
@@ -676,8 +673,11 @@ def test_llm_call_when_stop_is_unsupported(caplog):
     assert isinstance(result, str)
     assert "Paris" in result
 
+
 @pytest.mark.vcr(filter_headers=["authorization"])
-def test_llm_call_when_stop_is_unsupported_when_additional_drop_params_is_provided(caplog):
+def test_llm_call_when_stop_is_unsupported_when_additional_drop_params_is_provided(
+    caplog,
+):
     llm = LLM(model="o1-mini", stop=["stop"], additional_drop_params=["another_param"])
     with caplog.at_level(logging.INFO):
         result = llm.call("What is the capital of France?")
@@ -690,6 +690,7 @@ def test_llm_call_when_stop_is_unsupported_when_additional_drop_params_is_provid
 def ollama_llm():
     return LLM(model="ollama/llama3.2:3b")
 
+
 def test_ollama_appends_dummy_user_message_when_last_is_assistant(ollama_llm):
     original_messages = [
         {"role": "user", "content": "Hi there"},
diff --git a/tests/tracing/test_tracing.py b/tests/tracing/test_tracing.py
new file mode 100644
index 000000000..03fc3ddb5
--- /dev/null
+++ b/tests/tracing/test_tracing.py
@@ -0,0 +1,313 @@
+import os
+import pytest
+from unittest.mock import patch, MagicMock
+
+# Remove the module-level patch
+from crewai import Agent, Task, Crew
+from crewai.utilities.events.listeners.tracing.trace_listener import (
+    TraceCollectionListener,
+)
+from crewai.utilities.events.listeners.tracing.trace_batch_manager import (
+    TraceBatchManager,
+)
+from crewai.utilities.events.listeners.tracing.types import TraceEvent
+
+
+class TestTraceListenerSetup:
+    """Test TraceListener is properly setup and collecting events"""
+
+    @pytest.fixture(autouse=True)
+    def mock_auth_token(self):
+        """Mock authentication token for all tests in this class"""
+        # Need to patch all the places where get_auth_token is imported/used
+        with (
+            patch(
+                "crewai.cli.authentication.token.get_auth_token",
+                return_value="mock_token_12345",
+            ),
+            patch(
+                "crewai.utilities.events.listeners.tracing.trace_listener.get_auth_token",
+                return_value="mock_token_12345",
+            ),
+            patch(
+                "crewai.utilities.events.listeners.tracing.trace_batch_manager.get_auth_token",
+                return_value="mock_token_12345",
+            ),
+            patch(
+                "crewai.utilities.events.listeners.tracing.interfaces.get_auth_token",
+                return_value="mock_token_12345",
+            ),
+        ):
+            yield
+
+    @pytest.fixture(autouse=True)
+    def clear_event_bus(self):
+        """Clear event bus listeners before and after each test"""
+        from crewai.utilities.events import crewai_event_bus
+
+        # Store original handlers
+        original_handlers = crewai_event_bus._handlers.copy()
+
+        # Clear for test
+        crewai_event_bus._handlers.clear()
+
+        yield
+
+        # Restore original state
+        crewai_event_bus._handlers.clear()
+        crewai_event_bus._handlers.update(original_handlers)
+
+    @pytest.fixture(autouse=True)
+    def reset_tracing_singletons(self):
+        """Reset tracing singleton instances between tests"""
+        # Reset TraceCollectionListener singleton
+        if hasattr(TraceCollectionListener, "_instance"):
+            TraceCollectionListener._instance = None
+            TraceCollectionListener._initialized = False
+
+        yield
+
+        # Clean up after test
+        if hasattr(TraceCollectionListener, "_instance"):
+            TraceCollectionListener._instance = None
+            TraceCollectionListener._initialized = False
+
+    @pytest.fixture(autouse=True)
+    def mock_plus_api_calls(self):
+        """Mock all PlusAPI HTTP calls to avoid network requests"""
+        with (
+            patch("requests.post") as mock_post,
+            patch("requests.get") as mock_get,
+            patch("requests.put") as mock_put,
+            patch("requests.delete") as mock_delete,
+            patch.object(TraceBatchManager, "initialize_batch", return_value=None),
+            patch.object(
+                TraceBatchManager, "_finalize_backend_batch", return_value=True
+            ),
+            patch.object(TraceBatchManager, "_cleanup_batch_data", return_value=True),
+        ):
+            mock_response = MagicMock()
+            mock_response.status_code = 200
+            mock_response.json.return_value = {
+                "id": "mock_trace_batch_id",
+                "status": "success",
+                "message": "Batch created successfully",
+            }
+            mock_response.raise_for_status.return_value = None
+
+            mock_post.return_value = mock_response
+            mock_get.return_value = mock_response
+            mock_put.return_value = mock_response
+            mock_delete.return_value = mock_response
+
+            yield {
+                "post": mock_post,
+                "get": mock_get,
+                "put": mock_put,
+                "delete": mock_delete,
+            }
+
+    @pytest.mark.vcr(filter_headers=["authorization"])
+    def test_trace_listener_collects_crew_events(self):
+        """Test that trace listener properly collects events from crew execution"""
+
+        with patch.dict(os.environ, {"CREWAI_TRACING_ENABLED": "true"}):
+            agent = Agent(
+                role="Test Agent",
+                goal="Test goal",
+                backstory="Test backstory",
+                llm="gpt-4o-mini",
+            )
+            task = Task(
+                description="Say hello to the world",
+                expected_output="hello world",
+                agent=agent,
+            )
+            crew = Crew(agents=[agent], tasks=[task], verbose=True)
+
+            trace_listener = TraceCollectionListener()
+            from crewai.utilities.events import crewai_event_bus
+
+            trace_listener.setup_listeners(crewai_event_bus)
+
+            with patch.object(
+                trace_listener.batch_manager,
+                "initialize_batch",
+                return_value=None,
+            ) as initialize_mock:
+                crew.kickoff()
+
+                assert initialize_mock.call_count >= 1
+
+                call_args = initialize_mock.call_args_list[0]
+                assert len(call_args[0]) == 2  # user_context, execution_metadata
+                _, execution_metadata = call_args[0]
+                assert isinstance(execution_metadata, dict)
+                assert "crew_name" in execution_metadata
+
+    @pytest.mark.vcr(filter_headers=["authorization"])
+    def test_batch_manager_finalizes_batch_clears_buffer(self):
+        """Test that batch manager properly finalizes batch and clears buffer"""
+
+        with patch.dict(os.environ, {"CREWAI_TRACING_ENABLED": "true"}):
+            agent = Agent(
+                role="Test Agent",
+                goal="Test goal",
+                backstory="Test backstory",
+                llm="gpt-4o-mini",
+            )
+
+            task = Task(
+                description="Say hello to the world",
+                expected_output="hello world",
+                agent=agent,
+            )
+
+            crew = Crew(agents=[agent], tasks=[task], verbose=True)
+
+            from crewai.utilities.events import crewai_event_bus
+
+            trace_listener = None
+            for handler_list in crewai_event_bus._handlers.values():
+                for handler in handler_list:
+                    if hasattr(handler, "__self__") and isinstance(
+                        handler.__self__, TraceCollectionListener
+                    ):
+                        trace_listener = handler.__self__
+                        break
+                if trace_listener:
+                    break
+
+            if not trace_listener:
+                pytest.skip(
+                    "No trace listener found - tracing may not be properly enabled"
+                )
+
+            with patch.object(
+                trace_listener.batch_manager,
+                "finalize_batch",
+                wraps=trace_listener.batch_manager.finalize_batch,
+            ) as finalize_mock:
+                crew.kickoff()
+
+                assert finalize_mock.call_count >= 1
+
+    @pytest.mark.vcr(filter_headers=["authorization"])
+    def test_events_collection_batch_manager(self, mock_plus_api_calls):
+        """Test that trace listener properly collects events from crew execution"""
+
+        with patch.dict(os.environ, {"CREWAI_TRACING_ENABLED": "true"}):
+            agent = Agent(
+                role="Test Agent",
+                goal="Test goal",
+                backstory="Test backstory",
+                llm="gpt-4o-mini",
+            )
+            task = Task(
+                description="Say hello to the world",
+                expected_output="hello world",
+                agent=agent,
+            )
+            crew = Crew(agents=[agent], tasks=[task], verbose=True)
+
+            from crewai.utilities.events import crewai_event_bus
+
+            # Create and setup trace listener explicitly
+            trace_listener = TraceCollectionListener()
+            trace_listener.setup_listeners(crewai_event_bus)
+
+            with patch.object(
+                trace_listener.batch_manager,
+                "add_event",
+                wraps=trace_listener.batch_manager.add_event,
+            ) as add_event_mock:
+                crew.kickoff()
+
+                assert add_event_mock.call_count >= 2
+
+                completion_events = [
+                    call.args[0]
+                    for call in add_event_mock.call_args_list
+                    if call.args[0].type == "crew_kickoff_completed"
+                ]
+                assert len(completion_events) >= 1
+
+                # Verify the first completion event has proper structure
+                completion_event = completion_events[0]
+                assert "crew_name" in completion_event.event_data
+                assert completion_event.event_data["crew_name"] == "crew"
+
+                # Verify all events have proper structure
+                for call in add_event_mock.call_args_list:
+                    event = call.args[0]
+                    assert isinstance(event, TraceEvent)
+                    assert hasattr(event, "event_data")
+                    assert hasattr(event, "type")
+
+    @pytest.mark.vcr(filter_headers=["authorization"])
+    def test_trace_listener_disabled_when_env_false(self):
+        """Test that trace listener doesn't make HTTP calls when tracing is disabled"""
+
+        with patch.dict(os.environ, {"CREWAI_TRACING_ENABLED": "false"}):
+            agent = Agent(
+                role="Test Agent",
+                goal="Test goal",
+                backstory="Test backstory",
+                llm="gpt-4o-mini",
+            )
+            task = Task(
+                description="Say hello to the world",
+                expected_output="hello world",
+                agent=agent,
+            )
+
+            crew = Crew(agents=[agent], tasks=[task], verbose=True)
+            result = crew.kickoff()
+            assert result is not None
+
+            from crewai.utilities.events import crewai_event_bus
+
+            trace_handlers = []
+            for handlers in crewai_event_bus._handlers.values():
+                for handler in handlers:
+                    if hasattr(handler, "__self__") and isinstance(
+                        handler.__self__, TraceCollectionListener
+                    ):
+                        trace_handlers.append(handler)
+                    elif hasattr(handler, "__name__") and any(
+                        trace_name in handler.__name__
+                        for trace_name in [
+                            "on_crew_started",
+                            "on_crew_completed",
+                            "on_flow_started",
+                        ]
+                    ):
+                        trace_handlers.append(handler)
+
+            assert len(trace_handlers) == 0, (
+                f"Found {len(trace_handlers)} trace handlers when tracing should be disabled"
+            )
+
+    def test_trace_listener_setup_correctly(self):
+        """Test that trace listener is set up correctly when enabled"""
+
+        with patch.dict(os.environ, {"CREWAI_TRACING_ENABLED": "true"}):
+            trace_listener = TraceCollectionListener()
+
+            assert trace_listener.trace_enabled is True
+            assert trace_listener.batch_manager is not None
+            assert trace_listener.trace_sender is not None
+
+    # Helper method to ensure cleanup
+    def teardown_method(self):
+        """Cleanup after each test method"""
+        from crewai.utilities.events import crewai_event_bus
+
+        crewai_event_bus._handlers.clear()
+
+    @classmethod
+    def teardown_class(cls):
+        """Final cleanup after all tests in this class"""
+        from crewai.utilities.events import crewai_event_bus
+
+        crewai_event_bus._handlers.clear()