How much does OpenAI Decisions API cost?

OpenAI Decisions API pricing: Per token usage.

Is OpenAI Decisions API open source?

No, OpenAI Decisions API is not open source.

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OpenAI Decisions API

Typed answers with probabilities for yes/no checks, fixed choices and rubric scores

The Decisions API is OpenAI's endpoint for questions with a fixed set of answers. You send text, images or both with predicate, choice or score questions to POST /v1/decisions. It returns probabilities instead of generated text. gpt-6-luna is the only model so far.

It is generally available, after a public beta, with up to 400 questions per request. Zero data retention and HIPAA are available to eligible customers, with data residency in the US and Europe.

Uncached input costs $0.10 per 1M tokens. Cache hits are discounted, cache writes are charged and output is free.

Pricing: Per token usage

Hosting Cloud

Pricing Usage Based, $0.10 per 1M input tokens, output free

HQ 🇺🇸 United States

License PROPRIETARY

Compliance SOC 2 · HIPAA · GDPR

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Screenshot of OpenAI Decisions API webpage

OpenAI Decisions API prices by model

Per 1M tokens, read off OpenAI Decisions API's own pricing page on the date shown.

Model	Input / 1M	Cached / 1M	Output / 1M	Checked	Notes
OpenAI Decisions (gpt-6-luna)	$0.10	–	$0.00	25 Oct 2026	Generally available. No output charges; cache reads and writes follow the gpt-6-luna caching rates.