OpenRouter

A unified API gateway that gives developers access to hundreds of AI models through a single endpoint. OpenRouter handles model routing, fallbacks, and rate limiting — letting you switch between GPT-4, Claude, Llama, Mistral, and dozens of other models without changing your code.

• Unified API — one endpoint for OpenAI, Anthropic, Google, Meta, and 100+ models • Smart routing — automatic fallback to alternative models if your primary is unavailable • Usage tracking — monitor costs and usage across all models from one dashboard • OAuth support — let users bring their own API keys for your application • Competitive pricing — access models at or below direct API pricing • No lock-in — switch models with a single parameter change

Pay-per-use with no subscription. Pricing matches or undercuts direct model providers.