Framework & Tool
OpenRouter
Aggregator API that unifies 200+ LLMs behind an OpenAI-compatible interface.
Definition
OpenRouter routes a single API call to dozens of LLM providers (OpenAI, Anthropic, Mistral, OpenAI-compatible self-hosted, etc.), with optional fallback and price-aware routing. It is a model-router pattern aimed at developers who want vendor neutrality.
Common use cases
- Multi-provider apps
- Fallback routing
- Cost arbitrage