OpenAI unveils Decisions API built on its Luna model
At DevDay, OpenAI announced a Decisions API based on Luna, its smallest and cheapest model: instead of prose it returns one of the developer's predefined answers with a confidence score in 150 ms, versus 1.6 s for GPT-6 Luna. The API is in limited preview, with broad rollout planned in the coming days.
- Decisions API returns results in 150 ms; GPT-6 Luna takes 1.6 s
- The model returns a predefined answer with a confidence score
- Currently in limited preview, broad release expected in days
- Per-call pricing and the cap on candidate answers are undisclosed
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