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How to Build an LLM Router That Routes by Complexity

TL;DR An LLM router chooses a model per request, so short lookups go to a fast, cheap model and multi-step reasoning goes to a frontier model, with no application code changes. The Bifrost complexity router classifies each request as SIMPLE , MEDIUM , or COMPLEX and exposes the result as complexity…

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  1. 2026-10-29 18:23 · DEV Community — Machine Learning
    How to Build an LLM Router That Routes by Complexity

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