OpenAI Decisions API generally available: what's new (October 22, 2026)
OpenAI made the Decisions API generally available. It is built with GPT-6 Luna, and OpenAI reports it is up to 10 times faster than GPT-6 Luna through the Responses API, which is a vendor-reported comparison, at a stated $0.10 per million input tokens and $0.01 per million cached input tokens.
Who it is for
Readers following a public model or product announcement. AIToolStack does not score this as its own tool.