OpenRouter

OpenRouter: The unified API gateway for hundreds of LLMs, providing single-endpoint access, automatic fallbacks, and cost-optimized routing across all major providers (e.g., OpenAI, Anthropic, Google).

OpenRouter is your single, high-efficiency API gateway to hundreds of LLMs from over 60 providers, including OpenAI, Anthropic, and Google. We eliminate the integration complexity: one API key, one endpoint, zero code rewrites when switching between models like GPT-5 or Claude Sonnet 4.5. The platform automatically handles dynamic routing for cost-optimization, pools provider uptime for superior reliability, and consolidates all usage into a single billing dashboard. Expect minimal impact on performance: we operate at the edge, adding approximately 15ms latency, and maintain full compatibility with the OpenAI SDK.

https://openrouter.ai