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Release Wed, Sep 23, 2026 1 min read

langchain-openai== 1.6.5

Original release notes

Changes since langchain-openai==1.6.4

release(openai): 1.6.5 (#40787) fix(anthropic): add Opus 5.5 and GPT-6 profile augmentations (#40785) feat(anthropic,openai): mid-conversation tool changes on SystemMessage (#40758)