OpenAI makes its Decisions API generally available at $0.10 per million input tokens

The new endpoint runs on GPT-6 Luna, bills only for input, and is built for fast, structured yes-or-no style calls at scale OpenAI has opened its Decisions API to everyone with API access. General availability arrived on October 22, 2026, with pricing set at $0.10 per million input tokens . The Decisions API is designed for high-volume, low-latency decision-making. Instead of returning paragraphs, it produces structured, typed answers in the form of probabilities, choices, and scores. The endpoint runs on OpenAI’s GPT-6 Luna model. It targets routing requests, classifying inputs, and repeated micro-decisions.