microsoft/best-route-llm

LLMRouter: An Open-Source Library for LLM Routing

A framework for serving and evaluating LLM routers - save LLM costs without compromising quality

A curated list of awesome works in Routing LLMs paradigm (👉 Welcome to submit your contributions to this code repository)

brick is a smart AI Models router, based on complexity & capabilities extraction from the query to the models via proprietary spatial embedding algorythm

Route every prompt to the best LLM — for you specifically.

RouterArena: An open framework for evaluating LLM routers with standardized datasets, metrics, an automated framework, and a live leaderboard.

AgentOpt automatically finds the best LLM model combination for each step of your agent — optimizing for accuracy, cost, and latency.

The code for the paper ROUTERBENCH: A Benchmark for Multi-LLM Routing System

[NeurIPS'25] The official code implementation for paper "R2R: Efficiently Navigating Divergent Reasoning Paths with Small-Large Model Token Routing"