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by mapontosevenths 133 days ago
Have you tried Deep Think? You only get access with the Ultra tier or better... but wow. It's MUCH smarter than GPT 5.2 even on xhigh. It's math skills are a bit scary actually. Although it does tend to think for 20-40 minutes.
1 comments

I tried Gemini 2.5 Deep Think, was not very impressed ... too much hallucinations. In comparison GPT 5.2 extended time hallucinates at like <25% of the time and if you ask another copy to proofread it goes even lower.
I never tried 2.5. Three is pretty solid though, at least for my use case.

If there's a specific query you want me to run through it for comparison I'm happy to give it a go.