Building a dynamic model router middleware for LangChain with Jev

Arindam Majumder 𝕏 @Arindam_1729Originally posted 2026.09.25

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A bit late to the party, but I was catching up :) Built a quick model router with @LangChain , using @typesafeai ’s Jev as the middleware/router layer and @nebiustf models underneath. The router switches between GLM 5.3 Flash and other 5.3-based models depending on the task. Pretty fun little experiment to see how dynamic model routing works in practice.