OpenRouter API

Access 400+ AI models from 60+ providers (GPT-4, Claude, Llama) through a single, unified, OpenAI-compatible API endpoint.

OpenRouter API is your single-point interface for large language models (LLMs). It consolidates access to over 400 models from 60+ providers—including OpenAI, Anthropic, and Google—using a single API key and an OpenAI-compatible schema. This design simplifies multi-model integration, allowing developers to switch between models (e.g., from GPT-4 to Claude Opus) by changing a single parameter, without rewriting code. The platform features smart routing for automatic cost optimization and built-in fallbacks, ensuring high uptime and reliability for production applications. You get consolidated billing and pass-through pricing (provider rate plus 5%) across all models.

https://openrouter.ai/