tl;dr: OpenAI's new Decisions API (public beta) offers a dedicated `/v1/decisions` endpoint that returns typed answers—predicates (probabilities), choices (categories), or scores (ordered levels)—roughly 10x faster than the Responses API. It currently runs only on gpt-6-luna at $0.10 per 1M input tokens, with no output-token charges, and accepts text or inline base64 images as input. It's aimed at classification, routing, and prioritization tasks, as opposed to Structured Outputs or function calling.