LangChain 1.4.9 ships standardized refusal content blocks, requires core 1.7.5+
caolonghua · x · 2026-11-05
LangChain 1.4.9 is out, with release notes requiring langchain-core 1.7.5 or later for refusal handling and listing a change to standardize model refusal content blocks.
Per GitHub's release API, the version was published at 17:07:37 UTC on November 4, 2026. No further implementation details were provided. Developers using LangChain to handle model refusals should check the dependency requirement when upgrading.
Related event: LangChain Ships New Release Unifying Model Refusal Handling(2 posts)→