Decision Models / Decisions API
BETA
By OpenAI · Released 29 Sep 2026
OpenAI's decision endpoint, announced at DevDay 2026. It focuses GPT-6 Luna on a fixed set of developer-defined answers, to classify inputs, route requests or choose an agent's next action.
Source: API changelog → Source: DevDay announcement → Source: DevDay recap →
A live site where OpenAI Decisions, Jev and Cloudflare's Clef put a probability on live questions after reading recent news, never the odds. Their probabilities are compared against Polymarket and Kalshi prices.
A proof of concept that classifies incoming requests with the Decisions API preview and hands them to worker agents. Its README warns that the preview's request format is not yet published.
Calls Jev, OpenAI's Decisions API, Upstage Solar Decide and local Ollama models through one interface and logs version, latency, tokens and cost. On picking the right one of 12 tools for 40 Korean and English requests, the maker measured Jev 1.13 at 40 of 40 and OpenAI Decisions at 0.90, against 0.85 for a generative model choosing directly.