LLMRouter alternatives
Curated alternatives to LLMRouter — and why you'd switch.
router
Weave's Go model router: drop-in proxy speaking Anthropic, OpenAI and Gemini APIs that scores each request with an on-box ONNX embedder (Avengers-Pro clusters) and routes to the cheapest fit model.
Why switchBoth pick a model per prompt from learned routers; llmrouter is a UIUC research library with 16+ trainable routers, weave router is a deployable proxy with one frozen cluster scorer and an optional HMM policy.
Full comparison →plano
AI-native Envoy-based proxy for agentic apps: agent orchestration via a 4B routing model, smart LLM routing, guardrail filter chains and zero-code OTEL traces. Rust, framework-agnostic.
Why switchBoth route each request to the right LLM. Plano bakes a 4B routing model into an Envoy proxy you deploy; LLMRouter is the library of routing methods you train on your own data and serve yourself.
Full comparison →semantic-router
vLLM's programmable decision layer: one endpoint for your agent harness that selects or combines models per call by policy — quality, latency, cost, location — across local and cloud backends.
Why switchSame job — pick the best model per query; llmrouter is a research library of trainable routers, SR a production gateway built around that decision.
Full comparison →