OpenRouter

OpenRouter is a model aggregation and routing API that lets developers access hundreds of LLMs without juggling separate provider keys or SDKs. Drop in a single OpenRouter API key and use the familiar OpenAI SDK to call Claude, GPT, Gemini, Llama, Mistral, and 400+ other models in the same request format. The platform automatically handles provider routing, failover, and uptime optimization across its distributed edge infrastructure, processing over 100 trillion tokens per month for 4.2M+ users and 250k+ integrated apps. Pricing is pay-as-you-go on a credit system, typically at or below direct provider rates. Additional features include per-request data policies to control which providers see your prompts, built-in analytics and model benchmarks, an MCP server, and an Image API.