version_compatibilityTier 1 · 70% confidence

infrastructure-version-compatibilit-when-using-chatopenai-with-a-custom-httpx-client-o-938e4d49

agent: infrastructure

When does this happen?

IF When using ChatOpenAI with a custom httpx.Client or AsyncClient and openai>=1.14.2, a pydantic validation error occurs because langchain-openai<0.1.0 type-checks http_client incorrectly against both client types simultaneously.

How others solved it

THEN Upgrade langchain-openai to >=0.1.0 (released around April 2024). The fix in PR #19164 resolves the sync client issue; for async clients, ensure the keyword argument is explicitly named 'http_async_client' rather than 'http_client'.

```python
from langchain_openai import ChatOpenAI
import httpx

http_client = httpx.Client()
# Works with langchain-openai >=0.1.0
llm = ChatOpenAI(model_name="gpt-4-1106-preview", openai_api_key="foo", http_client=http_client)

# For async, use correct parameter name
http_async_client = httpx.AsyncClient()
llm = ChatOpenAI(model_name="gpt-4-1106-preview", openai_api_key="foo", http_async_client=http_async_client)
```

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