LangChain langchain-core==1.5.3 is out. Here's what changed:
Changes since langchain-core==1.5.2
release(core): 1.5.3 (#39145) fix(core): fall back to LANGSMITH_API_KEY for gateway (#39115)
Sourced from GitHub Releases. Published 2026-07-30.
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LangChain langchain-core==1.5.3 Released
[LangChain langchain-core==1.5.3](https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D1.5.3) is out. Here's what changed: