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Build more responsive apps with the Decisions API

GA2 days agoUnverifiedAdded Oct 23, 2026

The Decisions API provides low-cost, focused decision-making capabilities for applications.

Topics: LLMs

OpenAI's release notes

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GAunverified

The Decisions API is now generally available with gpt-6-luna

The Decisions API is now generally available with gpt-6-luna. Cache shared input across requests for prompt-cache discounts, include images in individual question instructions, and pass structured data directly with input_json. Each request now supports up to 400 questions, increased from 200 in public beta. Review the changes since public beta.

Updateunverified

You can now choose 12-hour prompt caching in the API

You can now choose 12-hour prompt caching in the API. 12-hour prompt caching keeps shared instructions, tools, and context cached longer to benefit from lower cached-input pricing, even when requests are hours apart. 12-hour cache writes cost 2.5x the input token price. Read more here.

Updateunverified

Released prompt-to-voice for all API customers

Released prompt-to-voice for all API customers. Create a custom voice from a text description through the API or voice Playground, then reuse it in GPT-Live sessions. Creating a prompt-generated voice is free; speech generation uses regular GPT-Live session billing.

Updateunverified

Added native Decisions integration in GPT-Live

Added native Decisions integration in GPT-Live. Your app can act while your user is speaking or react to what Live says. Let Live call Decisions directly through native delegation, or trigger decisions as input or output transcript deltas arrive.

Updateunverified

Added Ultrafast mode for GPT-6.1 Sol in the Responses API

Added Ultrafast mode for GPT-6.1 Sol in the Responses API. Use gpt-6.1-sol with service_tier: "ultrafast" to reduce the time between generated output tokens. It is available to all API users, subject to rate limits, with global processing and US and EU data residency. See Ultrafast pricing.

Also shipped on Oct 22, 2026

OpenAI in October 2026