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.

Reasoning LLM API

Extended-thinking models for math, planning and hard coding problems, with reasoning effort passed through where the provider supports it.

Reasoning LLM API models and pricing

Model	Provider	Context	Price
Qwen 3.8 Max (0902) `qwen/qwen3.8-max-0902`	Qwen	1M	$2.00 in / $6.00 out per 1M tokens
Claude Fable 5.1 `claude-fable-5-1`	Anthropic	1M	$10.00 in / $50.00 out per 1M tokens
Claude Fable 5 `claude-fable-5`	Anthropic	1M	$10.00 in / $50.00 out per 1M tokens
Claude Opus 5.5 `claude-opus-5-5`	Anthropic	1M	$4.00 in / $20.00 out per 1M tokens
Claude Opus 5 `claude-opus-5`	Anthropic	1M	$5.00 in / $25.00 out per 1M tokens
Claude Opus 4.8 `claude-opus-4-8`	Anthropic	1M	$5.00 in / $25.00 out per 1M tokens
Muse Spark 1.3 `muse-spark-1.3`	Meta	1M	$1.25 in / $4.25 out per 1M tokens
Claude Opus 4.7 `claude-opus-4-7`	Anthropic	200K	$5.00 in / $25.00 out per 1M tokens
Claude Sonnet 5.5 `claude-sonnet-5-5`	Anthropic	1M	$2.00 in / $10.00 out per 1M tokens
Claude Sonnet 5 `claude-sonnet-5`	Anthropic	1M	$2.00 in / $10.00 out per 1M tokens
Jev Router `typesafe/jev-router`	TypeSafe	1M	$1.25 in / $4.25 out per 1M tokens
Claude Haiku 5.5 `claude-haiku-5-5`	Anthropic	1M	$0.10 in / $0.50 out per 1M tokens
Qwen 3.8 27B `runanywhere/qwen3.8-27b`	RunAnywhere	256K	$0.20 in / $2.50 out per 1M tokens
GLM-5.3 Flash `runanywhere/glm-5.3-flash`	RunAnywhere	1M	$0.10 in / $0.35 out per 1M tokens
Muse Spark 1.3 Contributor `muse-spark-1.3-contributor`	Meta	1M	$0.10 in / $0.20 out per 1M tokens
Claude Opus 4.6 `claude-opus-4-6`	Anthropic	200K	$5.00 in / $25.00 out per 1M tokens
DeepSeek V4.1 Flash `deepseek-v4-flash`	DeepSeek	1M	$0.15 in / $0.60 out per 1M tokens
Qwen 3.8 Flash `qwen/qwen3.8-flash`	Qwen	1M	$0.15 in / $0.47 out per 1M tokens
Qwen 3.8 27B `cerebras/qwen-3.8-27b`	Cerebras	128K	$0.99 in / $1.49 out per 1M tokens
GPT-6 Sol `gpt-6-sol`	OpenAI	1.05M	$2.00 in / $10.00 out per 1M tokens
GPT-6 Luna `gpt-6-luna`	OpenAI	1.05M	$0.10 in / $0.50 out per 1M tokens
GPT-5.5 `gpt-5.5`	OpenAI	1.05M	$5.00 in / $30.00 out per 1M tokens
GPT-5.4 `gpt-5.4`	OpenAI	1.05M	$2.50 in / $15.00 out per 1M tokens
Gemini 3.7 Flash `gemini-3.7-flash`	Google	1M	$0.75 in / $3.75 out per 1M tokens
Gemini Latest `gemini-latest`	Google	1M	$0.75 in / $3.75 out per 1M tokens
Grok 4.7 `grok-4.7`	xAI	500K	$2.00 in / $6.00 out per 1M tokens
DeepSeek V4 Pro `deepseek-v4-pro`	DeepSeek	1M	$0.435 in / $0.87 out per 1M tokens
Qwen 3.8 Max `qwen/qwen3.8-max`	Qwen	1M	$2.00 in / $6.00 out per 1M tokens
Qwen 3.8 Max `or/qwen3.8-max`	OpenRouter	1M	$2.00 in / $6.00 out per 1M tokens
GPT-6.1 Sol `gpt-6.1-sol`	OpenAI	1.05M	$2.00 in / $10.00 out per 1M tokens
GPT-6.1 Terra `gpt-6.1-terra`	OpenAI	1.05M	$1.00 in / $5.00 out per 1M tokens
GPT-5.6 `gpt-5.6`	OpenAI	1.05M	$2.00 in / $12.00 out per 1M tokens
GPT-5.6 Sol `gpt-5.6-sol`	OpenAI	1.05M	$4.00 in / $20.00 out per 1M tokens
GPT-5.6 Terra `gpt-5.6-terra`	OpenAI	1.05M	$2.00 in / $12.00 out per 1M tokens
GPT-5.6 Luna `gpt-5.6-luna`	OpenAI	1.05M	$0.20 in / $1.20 out per 1M tokens
GPT-5.4 Mini `gpt-5.4-mini`	OpenAI	400K	$0.75 in / $4.50 out per 1M tokens
Gemini 3.8 Flash `gemini-3.8-flash`	Google	1M	$0.75 in / $3.75 out per 1M tokens
Gemini 3.5 Flash `gemini-3.5-flash`	Google	1M	$0.75 in / $3.75 out per 1M tokens
Grok 4.6 `grok-4.6`	xAI	500K	$2.00 in / $6.00 out per 1M tokens
Grok 4.5 `grok-4.5`	xAI	500K	$2.00 in / $6.00 out per 1M tokens

FAQ

Is it compatible with the OpenAI SDK?

Yes. Set base_url to https://openpaths.io/v1 and use your OpenPaths API key; request and response shapes follow the OpenAI API.

How do I set reasoning effort?

Send reasoning_effort in the request body; it is forwarded to providers that support it.

How is it priced?

Prepaid, pay-as-you-go credits at close to provider list price with no subscription. The tables on this page are generated from the live OpenPaths model catalog.

Chat Completions Coding LLM API Free LLM API