langchain-core==1.6.6

langchain-ai/langchain Releases Developers & Open Source 09/29/2026, 22:53 Score 8/10

Summary

Changes since langchain-core==1.6.5 release(core): 1.6.6 ( #40906 ) fix(anthropic): support Claude Sonnet 5.5 compatibility ( #40882 ) docs(core): fix docstring examples that don't run as copied ( #40815 )

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