Not in my experience (I use them every day). GPT 5.1 (now 5.2) is absolutely much more accurate for coding tasks. I think that 5.1. might even be better than gemini 3.

For PDF parsing and understanding, it's only anecdotal as it happened to me only once but Gemini was more accurate, that one time (a scientific paper).

Claude, when I was still subscribed to it, was in between gemini and GPT for code tasks. But the UI was too buggy and it was a bit too limited with their capacity threshold.