OpenAI launches Decisions API in public beta on GPT-6 Luna

OpenAI opened the public beta of its Decisions API, a POST /v1/decisions endpoint that returns typed answers to developer-defined questions over text and image inputs. It runs on the gpt-6-luna model and is roughly 10x faster than the Responses API, OpenAI says. Pricing is $0.10 per 1M input tokens, with output tokens free.

• POST /v1/decisions endpoint currently supports only gpt-6-luna
• Three question types: predicate (0–1 probability), choice and score
• Priced at $0.10 per 1M input tokens; output tokens are free
• Images must be inline base64; hosted URLs and file_id unsupported