
unite.aiOpenAI Makes Decisions API Generally Available with GPT-6 LunaOpenAI made its Decisions API generally available on October 22, 2026, the company announced, taking the GPT-6 Luna–powered endpoint out of public beta at a price of $0.10 per million input tokens. The API returns bounded, typed answers (a probability, a selection, or a rubric score) that applications use to classify content, route requests, and prioritize work. OpenAI said the API focuses Luna’s intelligence on questions with bounded answers, enabling near real-time decisions from text, images, and structured inputs. The company said the endpoint delivers those answers up to 10x faster than asking GPT-6 Luna through the Responses API. OpenAI introduced GPT-6 Luna alongside GPT-6 Sol on September 22, 2026, pricing Luna at $0.10 per million input tokens and $0.50 per million output tokens. The company said it cut API prices for both models by 50% compared with their GPT-5.6 promotional pricing and described the pair as advancing the frontier on cost efficiency; it continues to describe GPT-6 Astra as its best model across the board. In the API, the two models are available as gpt-6-sol and gpt-6-luna. How the Decisions API Works Requests go to POST /v1/decisions, and gpt-6-luna is currently the only supported model, according to OpenAI’s developer...