OpenAI Unveils Its Most Advanced O3 Reasoning Model on the Final Day of 'Shipmas'

OpenAI wrapped up its 12-day “shipmas” celebration with a major reveal on the final day.

On Friday, the company introduced o3, the next generation of its “reasoning” model series, following the earlier release of o1. The o3 family includes two versions: the full-fledged o3 model and a smaller variant, o3-mini, optimized for specific tasks through fine-tuning.