Introduction
AI Gateway provides unified, OpenAI/Anthropic-compatible access to multiple LLMs
Welcome to the AI Gateway documentation.
AI Gateway gives you a single API for major large language models (OpenAI, Anthropic, Gemini and more) while staying protocol-compatible with OpenAI and Anthropic. Migrate existing apps with zero code changes.
What you can do
- Call models with the official
openai/anthropicSDKs directly - Switch models freely with unified billing
- Stream responses, call functions, and use other advanced features
Recommended starting points
- Quickstart — make your first call in 5 minutes
- API Reference — full endpoint specs
- Models — supported models and capability matrix