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The LangChain You Learned in 2024 Doesn't Exist Anymore

This story is from 2026-09-23. It is preserved in the archive; the latest stories are on the live feed.

LLMChain and its siblings moved to a legacy package. The new core is one function, create_agent, plus middleware. Open a LangChain tutorial from 2024, follow it against a fresh install, and the imports fail before you write any logic. LLMChain is not in the main package anymore. Neither is initiali…

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  1. 2026-09-23 09:23 · DEV Community — AI
    The LangChain You Learned in 2024 Doesn't Exist Anymore

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