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.

Muse Spark 1.3 vs GPT-5 Chat Latest

For 10M input + 2M output tokens, Muse Spark 1.3 costs $21.00 versus $32.50 for GPT-5 Chat Latest (35% cheaper). Context windows: Muse Spark 1.3 1M, GPT-5 Chat Latest 400K.

Model	Provider	Context	Price
Muse Spark 1.3 `muse-spark-1.3`	Meta	1M	$1.25 in / $4.25 out per 1M tokens
GPT-5 Chat Latest `gpt-5-chat-latest`	OpenAI	400K	$1.25 in / $10.00 out per 1M tokens

Muse Spark 1.3 GPT-5 Chat Latest Chat Completions API