TypeSafe AI Jev middleware can route models for LangChain managed deep agents
Nathan Drezner says TypeSafe AI's Jev middleware can be used with LangChain managed deep agents for model routing. Users define routes, and Jev handles model selection.
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View all AI newsLangChain reports Jev matched a human reviewer vs GPT-5.6 and Claude Sonnet 4.6 as agent-eval judges
LangChain said it tested Jev against GPT-5.6 Luna, GPT-5.6 Terra, and Claude Sonnet 4.6 as agent-eval judges, reporting a human-reviewer match on every call, up to 913x lower variance, 0.44s per call, and a $0.34 full-run cost versus $28.17 with Claude Sonnet 4.6.
Jev-as-a-judge now available in LangSmith
LangChain says Jev-as-a-judge is now available in LangSmith. The company claims it can score every production trace, check more criteria per trace without rising cost, and catch safety or security issues fast enough to trigger an automated response.
LangChain makes SemIf free for the next week in LangSmith LLM Gateway
LangChain said it is making SemIf, an open-source decision model, free for the next week in LangSmith LLM Gateway. In the quoted post, Jacob Lee also said SemIf is being served free for the next week and is compatible with the TypeSafe SDK.
LangChain shares Sydney Runkle walkthrough of typesafeai’s new Jev model
LangChain highlighted a sub-10-minute video by Sydney Runkle breaking down @typesafeai’s new Jev model and how to plug it into agents.