OpenAI’s Decisions API goes GA and prices every verdict without a single output token

On October 22, 2026, OpenAI moved its Decisions API to general availability: a GPT-6 Luna-powered endpoint that returns a probability, a choice, or a score instead of text, priced at $0.10 per million input tokens with no output tokens charged. For teams orchestrating agents, it is the first time a typed verdict gets cheap enough to live in the hot path.