OpenAI's Decisions API vs System One: the same request in two shapes, and how to call 13 decision models with the OpenAI SDK

Automated excerpt

Checked 2026-10-08 against OpenAI's API reference and OpenRouter's /api/alpha/decisions. questions: an array [{type, name, ... }] questions: an object { id: {type, ... } } Pricing has the same shape on both sides: input tokens only. OpenRouter's Decisions API reads images only as chat-style image_url parts. Route a 77-intent classifier to one of those and the request is refused. | { type: "predicate"; name? : string; instructions: string } | { type: "choice"; name? : string; instructions: string; choices: { value: string; description? : string }[] } | { type: "score"; name?

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