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langchain_blog · Sep 18, 2026 · news

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What Is Jev? A Guide to TypeSafe AI’s System One Model

the LangChain blogSep 18, 2026
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In brief

What is Jev? Learn how TypeSafe AI’s System One model makes fast, structured decisions, where it fits in the agent loop, and how to use Jev with LangChain

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What Is Jev? A Guide to TypeSafe AI’s System One Model

Earlier in this thread 4 items

[AINews] Jev: a “System One Model” that only decides/classifies/routes/scores — >100x faster, >200x cheaper than small frontier LLMs

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