OpenAI introduced the Decisions API during the 2026 Developer Day. This tool is designed for real-time, low-latency classification and routing tasks. It utilizes the company's compact Luna model to deliver structured decision-making results.
The API provides responses in approximately 150 milliseconds, which is about 10 times faster than using the standard Luna API. It functions by focusing the model's intelligence on a set of user-defined questions and a limited range of potential answers.
Developers provide context in the form of text or images along with predefined options. The system then returns the selected answer and confidence scores. This structure allows for integration into existing business logic and automated workflows.
The API is suitable for customer service and ticketing systems to categorize issues and assign priorities. It also supports content moderation, agent orchestration for tool selection, and real-time business rule assistance where the model handles ambiguous cases.
