Reasoning models are supposed to fact-check themselves by producing a step-by-step plan to find a correct answer.

For 12 days straight, OpenAI unveiled 'new things, big and small.' Here's what's new today and a full round-up of all the announcements.

CEO Sam Altman closed out the 12 Days of OpenAI event Friday with a first look at the company's upcoming o3 reasoning model.

For the last day of ship-mas, OpenAI previewed a new set of frontier “reasoning” models dubbed o3 and o3-mini. The Verge first reported that a new reasoning model would be coming during this event. The company isn’t releasing these models today (and admits final results may evolve with more post-training).

OpenAI and the ARC Prize competition also shared how o3 scored 76 percent on the ARC-AGI benchmark, which includes novel unpublished datasets. The ARC-AGI benchmark is designed to test ability to learn new and distinct skills on the fly with every new task.

After nearly two weeks of announcements, OpenAI capped off its 12 Days of OpenAI livestream series with a preview of its next-generation frontier model.