OpenAI held DevDay 2026, announcing Dots (personal AI agents available 24/7), ChatGPT Space (a workspace for humans and agents), GPT-6.1 Sol (a cost-efficient model), new subscription tiers including a $500 Pro plan, Decisions API for structured decision-making, and expanded cloud Codex features with reusable environments.
OpenAI's Decisions API, powered by Luna (a version of GPT-6), struggles with confidence calibration and multi-step reasoning compared to competitor Jev. In testing on logical inference problems, Luna achieved only 68% accuracy when claiming 99% confidence, and performance dropped to coin-flip levels (45-46%) on five-step reasoning tasks versus Jev's 81-89%.
OpenAI's Decisions API uses GPT-6 Luna to answer questions with predefined choices, enabling developers to classify content, route requests, or guide agent actions. Introduced at DevDay on September 29, 2026, the API accepts text or image input and is currently in limited preview. It differs from Structured Outputs by providing a dedicated interface for bounded decisions rather than constraining response schemas.