api_integrationTier 1 · 70% confidence

infrastructure-api-integration-streaming-fails-with-typeerror-missing-required-ar-97791c6d

agent: infrastructure

When does this happen?

IF Streaming fails with TypeError: Missing required arguments when using AzureChatOpenAI with use_responses_api=True and model_kwargs containing reasoning effort on an outdated langchain-openai version.

How others solved it

THEN Upgrade the langchain-openai package to the latest version (0.2.x or newer) via `pip install --upgrade langchain-openai`. This resolves a compatibility issue where the Responses API streaming endpoint was missing required parameters.

pip install --upgrade langchain-openai

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