The biggest reason I avoid Gemini (and all of Google's models I've tried) is because I cannot get them to produce the same code I'd produce myself, while with OpenAI's models it's fairly trivial.

There is something deeper in the model that seemingly can be steered/programmed with the system/user prompts and it still produces kind of shitty code for some reason. Or I just haven't found the right way of prompting Google's stuff, could also be the reason, but seemingly the same approach works for OpenAI, Anthropic and others, not sure what to make of it.