# Issue with CrewAI Agent Output Format Validation **URL:** \ **Category:** CrewAI Community Support\ **Tags:** output\_issues, agent, task, crewai\ **Created:** [January 3, 2026, 5:37pm UTC](https://community.crewai.com/t/issue-with-crewai-agent-output-format-validation/7273 "2026-01-03T17:37:08Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![eZabaleta](https://sea1.discourse-cdn.com/flex025/user_avatar/community.crewai.com/ezabaleta/32/3128_2.png) [@eZabaleta](https://community.crewai.com/u/eZabaleta)\ **Post date:** [January 3, 2026, 5:37pm UTC](https://community.crewai.com/t/issue-with-crewai-agent-output-format-validation/7273/1 "2026-01-03T17:37:08Z")
# Issue with CrewAI Agent Output Format Validation Hi everyone, I’m trying to run a CrewAI really simple flow with an agent and a task, but I keep getting validation errors related to the output format, even though the agent correctly returns the expected output (`"I worked!"`). I’m hoping someone can point me in the right direction. * * * ## Code ```python import asyncio import json from pydantic import BaseModel from crewai import Agent, Task from crewai.flow.flow import Flow, start from langchain_openai import ChatOpenAI # ---- STATE ---- class State(BaseModel): steps: int = 0 code: str = "" llm: str = "gpt-3.5-turbo" # ---- FLOW ---- class DiagramFlow(Flow[State]): def update_steps(self): self.state.steps += 1 @start() def node_1(self): class OutputFormat(BaseModel): text: str extra_text: str llm_instance = ChatOpenAI( model_name=self.state.llm, temperature=0.7, ) # Create an Agent agent_name = Agent( role="Friendly assistant", goal="Return a message that says 'I worked!'", backstory="Testing agent call", tools=[], llm=llm_instance, verbose=False, ) task = Task( description="Return a string that says: 'I worked!'", expected_output="I worked!", # Attempt to solve the problem 1 output_pydantic=OutputFormat,# Attempt to solve the problem 2 ) result = agent_name.kickoff(task, response_format=OutputFormat) print("Raw result:", result.raw) # Kinda works print("Parsed output:", result.pydantic.text) # Error return result # ---- ENTRY POINT ---- if __name__ == " __main__": state = State() flow = DiagramFlow(state=state) flow.kickoff() ``` * * * ## Error ```auto Failed to parse output into response format: 1 validation error for OutputFormat Invalid JSON: key must be a string at line 1 column 2 [type=json_invalid, input_value="{'type': 'json_schema', ... 'extra_text': 'Success!'}", input_type=str] Traceback (most recent call last): ... AttributeError: 'NoneType' object has no attribute 'text' ``` The agent **does** return: ```json {'text': 'I worked!', 'extra_text': 'Success!'} ``` …but CrewAI fails to parse it into the Pydantic model, throwing a `json_invalid` error. And i can’t actually take the result from the result variable, not even using result.raw * * * ## What I’ve Tried - Passing the Pydantic model via `output_pydantic` and `response_format`. - Making sure the task description and expected output match the returned values. - Printing the raw result to verify the agent is returning correct data. * * * ## Question Has anyone faced this `json_invalid` error when using `output_pydantic` in CrewAI? It seems like the agent is returning a Python-style dict (`'` quotes) instead of proper JSON (`"` quotes), which prevents parsing. Could be that? Any suggestions on how to make CrewAI accept the output format correctly? ## Thanks in advance! Also By trying different solutions i have got this other error message, no idea what i have messed up. ```auto Starting LLM setup... Starting task execution... Agent failed to reach a final answer. This is likely a bug - please report it. An unknown error occurred. Please check the details below. Error details: 35 validation errors for LiteAgentExecutionStartedEvent messages.str Input should be a valid string [type=string_type, input_value=[{'role': 'system', 'cont...trigger_context', None)], input_type=list] For further information visit https://errors.pydantic.dev/2.12/v/string_type messages.list[dict[str,str]].1 Input should be a valid dictionary [type=dict_type, input_value=('used_tools', 0), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].2 Input should be a valid dictionary [type=dict_type, input_value=('tools_errors', 0), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].3 Input should be a valid dictionary [type=dict_type, input_value=('delegations', 0), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].4 Input should be a valid dictionary [type=dict_type, input_value=('i18n', I18N(prompt_file=None)), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].5 Input should be a valid dictionary [type=dict_type, input_value=('name', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].6 Input should be a valid dictionary [type=dict_type, input_value=('prompt_context', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].7 Input should be a valid dictionary [type=dict_type, input_value=('description', "\n ...that says: 'I worked!'"), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].8 Input should be a valid dictionary [type=dict_type, input_value=('expected_output', 'I worked!'), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].9 Input should be a valid dictionary [type=dict_type, input_value=('config', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].10 Input should be a valid dictionary [type=dict_type, input_value=('callback', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].11 Input should be a valid dictionary [type=dict_type, input_value=('agent', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].12 Input should be a valid dictionary [type=dict_type, input_value=('context', NOT_SPECIFIED), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].13 Input should be a valid dictionary [type=dict_type, input_value=('async_execution', False), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].14 Input should be a valid dictionary [type=dict_type, input_value=('output_json', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].15 Input should be a valid dictionary [type=dict_type, input_value=('output_pydantic', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].16 Input should be a valid dictionary [type=dict_type, input_value=('response_model', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].17 Input should be a valid dictionary [type=dict_type, input_value=('output_file', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].18 Input should be a valid dictionary [type=dict_type, input_value=('create_directory', True), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].19 Input should be a valid dictionary [type=dict_type, input_value=('output', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].20 Input should be a valid dictionary [type=dict_type, input_value=('tools', []), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].21 Input should be a valid dictionary [type=dict_type, input_value=('security_config', Secur...ngerprint(metadata={}))), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].22 Input should be a valid dictionary [type=dict_type, input_value=('id', UUID('38c49b6a-f65...48e-b673-6434cf56e2fc')), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].23 Input should be a valid dictionary [type=dict_type, input_value=('human_input', False), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].24 Input should be a valid dictionary [type=dict_type, input_value=('markdown', False), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].25 Input should be a valid dictionary [type=dict_type, input_value=('converter_cls', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].26 Input should be a valid dictionary [type=dict_type, input_value=('processed_by_agents', set()), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].27 Input should be a valid dictionary [type=dict_type, input_value=('guardrail', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].28 Input should be a valid dictionary [type=dict_type, input_value=('guardrails', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].29 Input should be a valid dictionary [type=dict_type, input_value=('max_retries', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].30 Input should be a valid dictionary [type=dict_type, input_value=('guardrail_max_retries', 3), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].31 Input should be a valid dictionary [type=dict_type, input_value=('retry_count', 0), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].32 Input should be a valid dictionary [type=dict_type, input_value=('start_time', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].33 Input should be a valid dictionary [type=dict_type, input_value=('end_time', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].34 Input should be a valid dictionary [type=dict_type, input_value=('allow_crewai_trigger_context', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type Traceback (most recent call last): File "C:\Users\Burbu\OneDrive - UPV EHU\TFG\codigo\chatllm.py", line 62, in flow.kickoff() # 👈 esto ejecuta el flujo async correctamente ^^^^^^^^^^^^^^ File "C:\Users\Burbu\OneDrive - UPV EHU\TFG\codigo\venv\Lib\site-packages\crewai\flow\flow.py", line 816, in kickoff return asyncio.run(_run_flow()) ^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\Burbu\AppData\Local\Programs\Python\Python312\Lib\asyncio\runners.py", line 195, in run return runner.run(main) ^^^^^^^^^^^^^^^^ File "C:\Users\Burbu\AppData\Local\Programs\Python\Python312\Lib\asyncio\runners.py", line 118, in run return self._loop.run_until_complete(task) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\Burbu\AppData\Local\Programs\Python\Python312\Lib\asyncio\base_events.py", line 691, in run_until_complete return future.result() ^^^^^^^^^^^^^^^ File "C:\Users\Burbu\OneDrive - UPV EHU\TFG\codigo\venv\Lib\site-packages\crewai\flow\flow.py", line 814, in _run_flow return await self.kickoff_async(inputs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\Burbu\OneDrive - UPV EHU\TFG\codigo\venv\Lib\site-packages\crewai\flow\flow.py", line 897, in kickoff_async await asyncio.gather(*tasks) File "C:\Users\Burbu\OneDrive - UPV EHU\TFG\codigo\venv\Lib\site-packages\crewai\flow\flow.py", line 966, in _execute_start_method result = await self._execute_method(start_method_name, enhanced_method) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\Burbu\OneDrive - UPV EHU\TFG\codigo\venv\Lib\site-packages\crewai\flow\flow.py", line 1067, in _execute_method raise e File "C:\Users\Burbu\OneDrive - UPV EHU\TFG\codigo\venv\Lib\site-packages\crewai\flow\flow.py", line 1032, in _execute_method else method(*args, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\Burbu\OneDrive - UPV EHU\TFG\codigo\venv\Lib\site-packages\crewai\flow\flow.py", line 998, in enhanced_method return original_method(*args, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\Burbu\OneDrive - UPV EHU\TFG\codigo\venv\Lib\site-packages\crewai\flow\flow_wrappers.py", line 84, in __call__ return self._meth(self._instance, *args, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\Burbu\OneDrive - UPV EHU\TFG\codigo\chatllm.py", line 51, in node_1 result = agent_name.kickoff(task, response_format=OutputFormat) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\Burbu\OneDrive - UPV EHU\TFG\codigo\venv\Lib\site-packages\crewai\agent\core.py", line 1238, in kickoff return lite_agent.kickoff(messages) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\Burbu\OneDrive - UPV EHU\TFG\codigo\venv\Lib\site-packages\crewai\lite_agent.py", line 307, in kickoff raise e File "C:\Users\Burbu\OneDrive - UPV EHU\TFG\codigo\venv\Lib\site-packages\crewai\lite_agent.py", line 291, in kickoff return self._execute_core(agent_info=agent_info) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\Burbu\OneDrive - UPV EHU\TFG\codigo\venv\Lib\site-packages\crewai\lite_agent.py", line 313, in _execute_core event=LiteAgentExecutionStartedEvent( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\Burbu\OneDrive - UPV EHU\TFG\codigo\venv\Lib\site-packages\pydantic\main.py", line 250, in __init__ validated_self = self. __pydantic_validator__.validate_python(data, self_instance=self) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ pydantic_core._pydantic_core.ValidationError: 35 validation errors for LiteAgentExecutionStartedEvent messages.str Input should be a valid string [type=string_type, input_value=[{'role': 'system', 'cont...trigger_context', None)], input_type=list] For further information visit https://errors.pydantic.dev/2.12/v/string_type messages.list[dict[str,str]].1 Input should be a valid dictionary [type=dict_type, input_value=('used_tools', 0), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].2 Input should be a valid dictionary [type=dict_type, input_value=('tools_errors', 0), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].3 Input should be a valid dictionary [type=dict_type, input_value=('delegations', 0), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].4 Input should be a valid dictionary [type=dict_type, input_value=('i18n', I18N(prompt_file=None)), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].5 Input should be a valid dictionary [type=dict_type, input_value=('name', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].6 Input should be a valid dictionary [type=dict_type, input_value=('prompt_context', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].7 Input should be a valid dictionary [type=dict_type, input_value=('description', "\n ...that says: 'I worked!'"), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].8 Input should be a valid dictionary [type=dict_type, input_value=('expected_output', 'I worked!'), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].9 Input should be a valid dictionary [type=dict_type, input_value=('config', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].10 Input should be a valid dictionary [type=dict_type, input_value=('callback', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].11 Input should be a valid dictionary [type=dict_type, input_value=('agent', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].12 Input should be a valid dictionary [type=dict_type, input_value=('context', NOT_SPECIFIED), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].13 Input should be a valid dictionary [type=dict_type, input_value=('async_execution', False), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].14 Input should be a valid dictionary [type=dict_type, input_value=('output_json', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].15 Input should be a valid dictionary [type=dict_type, input_value=('output_pydantic', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].16 Input should be a valid dictionary [type=dict_type, input_value=('response_model', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].17 Input should be a valid dictionary [type=dict_type, input_value=('output_file', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].18 Input should be a valid dictionary [type=dict_type, input_value=('create_directory', True), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].19 Input should be a valid dictionary [type=dict_type, input_value=('output', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].20 Input should be a valid dictionary [type=dict_type, input_value=('tools', []), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].21 Input should be a valid dictionary [type=dict_type, input_value=('security_config', Secur...ngerprint(metadata={}))), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].22 Input should be a valid dictionary [type=dict_type, input_value=('id', UUID('38c49b6a-f65...48e-b673-6434cf56e2fc')), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].23 Input should be a valid dictionary [type=dict_type, input_value=('human_input', False), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].24 Input should be a valid dictionary [type=dict_type, input_value=('markdown', False), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].25 Input should be a valid dictionary [type=dict_type, input_value=('converter_cls', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].26 Input should be a valid dictionary [type=dict_type, input_value=('processed_by_agents', set()), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].27 Input should be a valid dictionary [type=dict_type, input_value=('guardrail', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].28 Input should be a valid dictionary [type=dict_type, input_value=('guardrails', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].29 Input should be a valid dictionary [type=dict_type, input_value=('max_retries', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].30 Input should be a valid dictionary [type=dict_type, input_value=('guardrail_max_retries', 3), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].31 Input should be a valid dictionary [type=dict_type, input_value=('retry_count', 0), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].32 Input should be a valid dictionary [type=dict_type, input_value=('start_time', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].33 Input should be a valid dictionary [type=dict_type, input_value=('end_time', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type messages.list[dict[str,str]].34 Input should be a valid dictionary [type=dict_type, input_value=('allow_crewai_trigger_context', None), input_type=tuple] For further information visit https://errors.pydantic.dev/2.12/v/dict_type 🌊 Flow: DiagramFlow ID: 7878c5d2-a5e8-4d7b-a368-7de9f326cdb9 ├── ✨ Created ├── ✅ Initialization Complete └── ❌ Failed: node_1 ``` ---
**Author:** ![Tony\_Wood](https://sea1.discourse-cdn.com/flex025/user_avatar/community.crewai.com/tony_wood/32/1876_2.png) [@Tony\_Wood](https://community.crewai.com/u/Tony_Wood)\ **Post date:** [January 4, 2026, 6:50am UTC](https://community.crewai.com/t/issue-with-crewai-agent-output-format-validation/7273/2 "2026-01-04T06:50:05Z")
Hi.. I think we are missing the agent in the task try task = Task( description=“Return JSON only with keys text and extra\_text. Use double quotes. No markdown.”, expected\_output=“Valid JSON object with keys: text, extra\_text.”, **agent=agent,** output\_pydantic=OutputFormat, ) ---
**Author:** ![eZabaleta](https://sea1.discourse-cdn.com/flex025/user_avatar/community.crewai.com/ezabaleta/32/3128_2.png) [@eZabaleta](https://community.crewai.com/u/eZabaleta)\ **Post date:** [January 7, 2026, 5:28pm UTC](https://community.crewai.com/t/issue-with-crewai-agent-output-format-validation/7273/3 "2026-01-07T17:28:08Z")
Thanks for the reply! Actually, the solution has been to change and run the task instead of the agent. Also, it seems that `gpt-3.5-turbo` doesn’t allow `OutputFormat`: ```python # ---- STATE ---- class State(BaseModel): steps: int = 0 code: str = "" llm: str = "gpt-4o-mini" <--- THIS llm_instance = ChatOpenAI( model_name=self.state.llm, temperature=0.7, ) # Create an Agent agent_name = Agent( role="Friendly assistant", goal="Return a message that says 'I worked!'", backstory="Testing async agent call", tools=[], llm=llm_instance, verbose=False, ) print("Starting task execution...") task = Task( description="""Return a JSON object with exactly two fields: - 'text': containing the message 'I worked!' - 'extra_text': containing 'Success!'""", expected_output="JSON object with 'text' and 'extra_text' fields", agent=agent_name, output_pydantic=OutputFormat, ) result = task.execute_sync() <--- THIS ``` ---
**Author:** ![system](https://us1.discourse-cdn.com/flex025/uploads/crewai/original/1X/ecda97e72f77c7100e0a761444b1c991925cc789.png) [@system](https://community.crewai.com/u/system)\ **Post date:** [January 8, 2026, 5:28pm UTC](https://community.crewai.com/t/issue-with-crewai-agent-output-format-validation/7273/4 "2026-01-08T17:28:21Z")
Closed on January 8, 2026, 5:28pm UTC This topic was automatically closed 24 hours after the last reply. New replies are no longer allowed.