unorouter

UnoRouter is an open-source AI router for builders who want an OpenRouter alternative they can inspect line by line. One OpenAI-compatible key opens models from OpenAI, Anthropic, Google, Meta, DeepSeek, Qwen and Mistral, and smart routing fails over to another provider automatically when the first one is down or rate limited.What sets it apart: the full stack is public, the built-in chat keeps every conversation in your browser, and there are free models to start with. It runs inside your own code, Claude Code, Cline, OpenCode and other OpenAI compatible clients. Paid usage is pay as you go after the free tier, never a subscription.