Gemini is a good and fast model, but I think the style of code it writes is... amateur / inexperienced. It doesn't make a lot of mistakes typical of an LLM, but rather chooses approaches that are typical of someone who just learned programming. I have to always nudge it to avoid verbosity, keep structure less repetitive, optimize async code, etc. With claude, I rarely have this problem -- it feels more like working with a more experienced developer.