Open Nai O3 Models 2025. Announced on december 20, 2025, these models. Openai's new o3 and o3 mini models, which are in internal safety testing currently, will be more powerful than its previously launched o1 models, the company said.

O3 is a model family, to be more precise — as was the case with. Openai’s new o3 and o3 mini models, which are in internal safety testing currently, will be more powerful than its previously launched o1 models, the company said.