Introducing o3 and o4-mini – ChatGPT’s Biggest Upgrade Yet

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I test OpenAI’s newest ChatGPT models — o3, o4 Mini, and o4 Mini High — which just came out for Pro and Teams plans. These are advanced “reasoning” models, and they think before they respond.

I show how 03 replaces the older 01 model, and how 04 Mini High is now the smartest one, especially for coding and visual tasks.

OpenAI official blog post: https://openai.com/index/introducing-o3-and-o4-mini/