OpenAI equips GPT-6 with a "fast brain"! Makes decisions in 100 milliseconds, API fully opened

What happened: OpenAI opened its Decisions API to all customers. The interface is built on the GPT-6 Luna reasoning model and returns probabilities, options, or scores for preset questions and answers. Key numbers: Response time cut from 1 to 3 seconds to 100, 120, or 180 milliseconds in some cases. Why it matters: The launch puts OpenAI in competition with TypeSafe's Jev decision model, and third-party rankings differ: Jev places 2nd on Artificial Analysis Decision Index versus 11th for Decisions API, while Jev leads OpenRouter usage.

OpenAI's GPT-6 gains 100-millisecond decision speed with fully opened API.

OpenAI's GPT-6 gains 100-millisecond decision speed with fully opened API. — impact context not separately stored; see What changed.