Use the Latest Pro Reasoning Model for Complex Tasks
He explains the difference between instant models and reasoning/pro models. The pro model thinks for minutes, iterating on scenarios. He pushed GPT-5.5 Pro to think for 2 hours on a dataset, which is like years of human thinking. This allows it to not just analyze data but generate deep insights and predict experimental outcomes with high accuracy.
I pushed it to think for two hours... It came up with this 40-page report... I would not have bet against 5.5 Pro myself.
My recommendation is always use the latest top model you can use. Right now it's GPT 5.5.

