OpenAI API that returns bounded decisions such as probabilities, choices from a set, or scores instead of free text.
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The Decisions API is an OpenAI developer API for fast, constrained model outputs. Rather than generating free-form text, it returns bounded answers: the probability that a predicate is true, a choice from a given set of options, or a score or ranking. According to creator coverage, it is built on GPT-6 Luna and is now generally available.
It is aimed at classification, routing, moderation-style checks and ranking tasks where latency and cost matter more than prose output. A sponsored segment described it as up to 10x faster than the Responses API with GPT-6 Luna. The same segment described pricing as $0.10 per million uncached input tokens with no output token charges. These figures come from creator reports and were not confirmed on the pricing page excerpt provided.
It is accessed through the OpenAI API platform and documented in the developer guides. Because it returns only bounded values, it is not suited to open-ended generation. Regional processing (data residency) endpoints carry a 10% uplift for models released on or after March 5, 2026.
Watch the moment: the exact second top creators show it. Videos load only when you press play, via youtube-nocookie.com.
Sponsored segment: an API for quick decisions (predicate probability, choice from options, score ranking), up to 10x faster than the Responses API in GPT-6 Luna, at 10 cents per million uncached input tokens with no output charges.
Now generally available, built with GPT-6 Luna; returns bounded answers such as probabilities, choices from a set, or scores rather than free text.
API announced at Dev Day that returns predefined decisions (predicates, choices, scores) instead of long text. It uses GPT-6 Luna and is meant to be ultra-fast and cheap.
API for real-time decision-making that outputs one of finite predefined answers to user-defined questions instead of text. Creator sees it as OpenAI's answer to Jev from the previous week.
Preview API of a model built for quick decisions, based on Luna, OpenAI's lightest and smallest model. The creator thinks a purpose-built decision model like Jev would still be faster.
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