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.

How much does GPT-6 Luna cost per million tokens?

GPT-6 Luna costs $0.10 in / $0.50 out per 1M tokens. Prompts over 272K tokens bill the whole request at $0.20 in / $0.75 out per 1M tokens.

Is there a discount for cached tokens on GPT-6 Luna?

Yes. Cached input is $0.01 per 1M tokens instead of $0.10.

What does a typical chatbot cost on GPT-6 Luna?

A chatbot sending 300,000 requests per month (1,500 input and 400 output tokens each, 50% cached) costs about $84.75 per month on GPT-6 Luna.

What is the context window of GPT-6 Luna?

GPT-6 Luna supports 1.05M tokens of context and up to 128K output tokens.

What is a cheaper alternative to GPT-6 Luna?

Z.ai: GLM 5.3 Flash is cheaper at $0.12 in / $0.40 out per 1M tokens.

GPT-6 Luna API Pricing (2026): $0.10 in / $0.50 out per 1M tokens

GPT-6 Luna pricing: $0.10 in / $0.50 out per 1M tokens. Prompts over 272K tokens cost more. Tier-aware calculator, cheaper alternatives and Artificial Analysis benchmarks.