It's dog-doo-doo. I put in my algebraic geometry final review (100's of thousands of tokens) and Gemini instantly found all the propositions, theorems, and problems that I needed in a neat list (in about 5 seconds), meanwhile ChatGPT 5.2 Thinking took 10mins before timing out and not even completing the request.
However, the model card for GPT 5.2 looks amazing, wish I could actually see that performance in action!