ChatGPT models: which to use when?

Written by Alec Fearon on 24 June 2025 in Anapoly Diary
Transparency label: Human-only
<--- That was the moment
---> No substitute for reading the paper

ChatGPT-4o	fast, for brainstorming, quick questions, general chat
o3	powerful, for serious work (analysis, writing, research, coding)
o3-pro	ultra-powerful, for the hardest problems

Source: One Useful Thing, Substack newsletter by Ethan Mollick, 23 June 2025