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-5.6 Terra cost per million tokens?

GPT-5.6 Terra costs $2.00 in / $12.00 out per 1M tokens.

Is there a discount for cached tokens on GPT-5.6 Terra?

No cached-input rate is configured for GPT-5.6 Terra, so every input token bills at the standard rate.

What does a typical chatbot cost on GPT-5.6 Terra?

A chatbot sending 300,000 requests per month (1,500 input and 400 output tokens each, 50% cached) costs about $2340.00 per month on GPT-5.6 Terra.

What is the context window of GPT-5.6 Terra?

GPT-5.6 Terra supports 1.05M tokens of context and up to 128K output tokens.

What is a cheaper alternative to GPT-5.6 Terra?

GPT-4o is cheaper at $2.50 in / $10.00 out per 1M tokens.

GPT-5.6 Terra API Pricing (2026): $2.00 in / $12.00 out per 1M tokens

GPT-5.6 Terra pricing: $2.00 in / $12.00 out per 1M tokens. Tier-aware calculator, cheaper alternatives and Artificial Analysis benchmarks.