I use only the APIs directly with Aider (so no experience with AI Studio).
My feeling with Claude is that they still perform good with weak prompts, the "taste" is maybe a little better when the direction is kinda unknown by the prompter.
When the direction is known I see Gemini 2.5 Pro (with thinking) on top of Claude with code which does not break. And with o4-mini and o3 I see more "smart" thinking (as if there is a little bit of brain inside these models) at the expense of producing unstable code (Gemini produces more stable code).
I see problems with Claude when complexity increases and I would put it behind Gemini and o3 in my personal ranking.
So far I had no reason to go back to Claude since o3-mini was released.