[Release] langchain-ai/langchain langchain-openai==1.3.4: langchain-openai==1.3.4

langchain-openai version 1.3.4 is a patch release that addresses several issues including suppressing Pydantic serializer warnings on structured output parsed fields, skipping Codex VCR tests before cassette setup, and fixing async context handling with asyncio.get_running_loop(). The release includes dependency bumps for langgraph-checkpoint and general maintenance updates across multiple directories.

Key Points

• •Fixed Pydantic serializer warning that occurred on structured output parsed fields
• •Improved test reliability by skipping Codex VCR tests before cassette setup
• •Corrected async context handling to use asyncio.get_running_loop() instead of deprecated patterns
• •Bumped langgraph-checkpoint dependency from 4.1.0 to 4.1.1 in the OpenAI partners library
• •Updated 11 dependencies across 3 directories as part of routine maintenance
• •Clarified async API key sync failure error traces for better debugging
• •Patch release focused on stability and compatibility improvements rather than new features

Concepts