Gemini is laughably behind the others though slightly better than Meta's current offering.
I find GPT-4 and Claude roughly on par with a slight edge to Claude. But when it fails, it does so catastrophically, whereas GPT-4 normally gives you at least something approaching a reasonable answer.
Another clear difference between them is that GPT-4 has a built-in code interpreter, and Claude doesn't. Some of the questions that GPT-4 gets correct that Claude doesn't are because GPT-4 can actually write code, run it, analyze the results, and self correct. Sometimes to a very impressive degree.