# LangChain highlights Typesafe Jev middleware for managed deep agent model routing

LangChain quoted nathan drezner and linked official docs for Typesafe AI’s Jev middleware, which can handle model selection for LangChain managed deep agents after users define routes.

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Source: LangChain · Published 9/21/2026, 11:03:11

LangChain pointed users to its [Typesafe model routing docs](https://docs.langchain.com/oss/python/integrations/providers/typesafe#model-routing) while quoting nathan drezner (@ndrezn) on **Jev middleware** from Typesafe AI.

Drezner said that if you are using **managed deep agents** in LangChain, you can define routes and have Jev handle model selection.

Tags: LangChain, Typesafe, Model routing, AI agents

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