OpenPaths is an open source model router and AI gateway. One API key and one base URL (https://openpaths.io/v1) reach language, image, video, speech, music, embedding and 3D models from many providers.

Is OpenPaths compatible with the OpenAI and Anthropic SDKs?

Yes. POST /v1/chat/completions follows the OpenAI schema and POST /v1/messages follows the Anthropic schema. Change the base URL and keep your existing code.

How does OpenPaths pricing work?

Pay as you go at the provider price with near-zero markup. Requests on your own provider keys (BYOK) are recorded at $0. See https://openpaths.io/pricing.

What does openpaths/auto do?

openpaths/auto routes each request to a suitable model automatically, with automatic fallbacks when a provider fails or rate-limits.

Is there an OpenAPI spec or MCP server?

Yes. The OpenAPI 3.1 spec is at https://openpaths.io/openapi.json, the MCP endpoint is https://openpaths.io/mcp, and llms.txt plus llms-full.txt list every model id.

The Open Source
Model Router.

You don't have to pick a model. Use openpaths/auto, auto thinking, and the -latest series to stay on the frontier.

Explore Models → View Source

One OpenAI-compatible API for every model

OpenPaths gives you a single key and base URL (https://openpaths.io/v1) for language, image, video, speech, music, embedding and 3D models. It speaks the OpenAI and Anthropic schemas, routes with openpaths/auto, retries on another provider when one fails, and keeps markup near zero. Bring your own provider keys and those requests record $0.

Model directory with pricing
Pricing
API docs
MCP server
OpenRouter and gateway alternatives
Use cases
Providers
Bring your own key
Model evals and speed
Compare models
LLM pricing comparison
Image, video and audio tools
OpenAPI spec
llms.txt
Status
Blog

Common questions

Is it compatible with the OpenAI and Anthropic SDKs?

Yes. Use /v1/chat/completions or /v1/messages and only change the base URL.

How is it priced?

Pay as you go at provider prices with near-zero markup; BYOK requests record $0.

How do agents discover the API?

Through /openapi.json, /.well-known/api-catalog, /llms.txt and the /mcp endpoint.