Validation errors for _GeminiResponse

[torayeff]

Initial Checks

• I confirm that I'm using the latest version of Pydantic AI

Description

I get the below error when trying to run simple agent with Gemini provider:

lib/python3.11/site-packages/pydantic/type_adapter.py", line 468, in validate_json
    return self.validator.validate_json(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
pydantic_core._pydantic_core.ValidationError: 4 validation errors for _GeminiResponse
candidates.0.avgLogProbs
  Field required [type=missing, input_value={'content': {'parts': [{'...': -0.05566399544477463}, input_type=dict]
    For further information visit https://errors.pydantic.dev/2.11/v/missing
candidates.0.index
  Field required [type=missing, input_value={'content': {'parts': [{'...': -0.05566399544477463}, input_type=dict]
    For further information visit https://errors.pydantic.dev/2.11/v/missing
candidates.0.safetyRatings
  Field required [type=missing, input_value={'content': {'parts': [{'...': -0.05566399544477463}, input_type=dict]
    For further information visit https://errors.pydantic.dev/2.11/v/missing
promptFeedback
  Field required [type=missing, input_value={'candidates': [{'content...on': 'gemini-2.0-flash'}, input_type=dict]
    For further information visit https://errors.pydantic.dev/2.11/v/missing

Example Code

from pydantic_ai import Agent

agent = Agent(model="google-gla:gemini-2.0-flash")
result = agent.run_sync("Hello, how are you?")
print(result.data)

Python, Pydantic AI & LLM client version

Python: 3.11.11
Pydantic: 2.11.0b1
Pydantic AI: 0.0.40

[torayeff]

pip install pydantic==2.10.6 solved the problem for now.

[Kludex]

Thanks for pointing out.