OpenAI is slowly inviting selected users to test a whole new set of reasoning models named o3 and o3 mini, successors to the o1 and o1-mini models that just entered full release earlier this month.

Reasoning models are supposed to fact-check themselves by producing a step-by-step plan to find a correct answer. Reading time 3 minutes The final day of OpenAI’s “12 Days of Shipmas” has arrived with ...

OpenAI saved its biggest announcement for the last day of its 12-day “shipmas” event. On Friday, the company unveiled o3, the successor to the o1 “reasoning” model it released earlier in the year. o3 ...