OpenRouter
New
Route requests to 200+ LLMs from a single API key. Swap models, run fallbacks, and compare costs across every major provider without rewriting your integration.
Developer Tools
★ 4.7(3,200 reviews)freemiumOverview
OpenRouter provides a unified API gateway to 200+ language models from every major provider — OpenAI, Anthropic, Google, Meta, Mistral, and dozens more — through a single OpenAI-compatible endpoint. Swap models with a one-line change, run automatic fallbacks when a model is unavailable, and compare costs across providers in real time. Free-tier credits are available on select open-source models; beyond that you pay per token at each model's published rate with no markup.
Key Features
- Access 200+ models via a single OpenAI-compatible endpoint
- Automatic fallback routing when a model is rate-limited or down
- Real-time cost comparison across providers
- Free daily credits on select open-source models
- Usage analytics and per-model spending dashboard
- Model context protocol (MCP) server support
Pros
- • OpenAI-compatible SDK — zero refactoring to switch
- • Broadest model selection of any routing layer
- • Transparent, pass-through pricing with no markup
Cons
- • Adds a network hop vs calling providers directly
- • Free credits are limited — sustained use requires billing
- • Some niche models have higher latency than direct access
Advertisement