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  • © 2026 OpenRouter, Inc

    One SDK for 300+ AI Models

    Access any LLM with streaming, tool calling, and agentic workflows built in. Start simple, add complexity when you need it.

    Flexible Results

    Stream, extract, and process the same response concurrently. No need to choose upfront.

    Built-In Streaming

    Streaming works out of the box. Custom events and transforms without the boilerplate.

    Isolated Tools

    Tools run separately from model calls. Clean boundaries, no tangled logic.

    Agentic Workflows

    Tools can modify the next request. Build complex agents as small, testable pieces.

    Scales Linearly

    Lightweight and modular. Small API that grows with you, no rewrites required.

    Drop-In Ready

    Works with existing AI SDKs. Migrate incrementally with full type safety.

    Simple, Powerful API

    Get started in minutes. TypeScript and Python SDKs available now.

    1

    Install

    Add the SDK to your project. TypeScript and Python available today.

    2

    Call Any Model

    Access 300+ models through one interface. Stream, extract, or batch results.

    3

    Ship & Scale

    Go from prototype to production. The same API works at any scale.

    Start Building Today

    Get your API key and ship your first AI feature in minutes.