ModelRefs / LLM Router — AI Glossary
LLM Router — AI Glossary
A classifier that selects which model, prompt, or tool to use for a given request based on content, cost, or capability requirements.
Overview
Routers sit at the entry point of LLM applications: a small, fast classifier reads the request and dispatches it to the cheapest model capable of handling it. Smart routing products: Not Diamond, Martian, LiteLLM router.
Reference details
| Topic | agents |
|---|---|
| Also known as | model router, query router |
| Last reviewed | 2026-06-24 |
Related terms
Referenced by
This term is used by the following ModelRefs references:
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Frequently asked questions
What is LLM Router?
A classifier that selects which model, prompt, or tool to use for a given request based on content, cost, or capability requirements.
Is LLM Router the same as model router?
Yes — model router, query router are common aliases for LLM Router.
What concepts are related to LLM Router?
Closely related concepts include model routing, model gateway.