OpenAI Launches Decisions API for Fast AI Choices (x.com)

OpenAI has launched its Decisions API in limited preview at DevDay on September 29, 2026, leveraging the advanced capabilities of the GPT-6 Luna model. This API allows developers to pose questions with predefined answers, enabling quick classification of content, request routing, and agent action selection, all executed in hundreds of milliseconds—approximately ten times faster than traditional chat interfaces. This swift response is particularly notable as it follows closely behind the debut of TypeSafe AI's Jev model, prompting discussions about OpenAI's agility in a competitive landscape. The significance of the Decisions API for the AI/ML community lies in its potential to streamline decision-making processes, making it a valuable tool for developers creating agent-based systems. The introduction of multimodal support enhances its versatility, although there are concerns about whether it can achieve the same calibrated confidence levels as Jev, especially in high-stakes scenarios. As the demand for efficient, cost-effective AI solutions grows, this API may pave the way for more accessible decision-making tools, benefiting businesses and developers looking to implement lightweight AI tools in their workflows.