Not a power user, but most recently I tried it out against Gemini and Claude produced something that compiled and almost worked - it was off in some specifics that I could easily tweak. The next thing I asked it (with slightly more detailed prompting) it more or less just nailed.

Meanwhile Gemini got itself stuck in a loop of compile/fail/try to fix/compile/fail again. Eventually it just gave up and said "I'm not able to figure this out". It does seem to have a kind of self-esteem problem in these scenarios, whereas Claude is more bullish on itself (maybe not always a good thing).

Claude seems to be the best at getting something that actually works. I do think Gemini will end up being tough competition, if nothing else because of the price, but Google really need a bit of a quality push on it. A free AI agent is worthless if it can't solve anything for me.