Main advantage over Sonnet is Gemini 2.5 doesn't try to make a bunch of unrelated changes like it's rewriting my project from scratch.

I find Gemini 2.5 truly remarkable and overall better than Claude, which I was a big fan of

What language / framework are you using? I ask because in a Node / Typescript / React project I experience the opposite- Claude 3.7 usually solves my query on the first try, and seems to understand the project's context, ie the file structure, packages, coding guidelines, tests, etc, while Gemini 2.5 seems to install packages willy-nilly, duplicate existing tests, create duplicate components, etc.

This was incredibly irritating at first, though over time I've learned to appreciate this "extra credit" work. It can be fun to see what Claude thinks I can do better, or should add in addition to whatever feature I just asked for. Especially when it comes to UI work, Claude actually has some pretty cool ideas.

If I'm using Claude through Copilot where it's "free" I'll let it do its thing and just roll back to the last commit if it gets too ambitious. If I really want it to stay on track I'll explicitly tell it in the prompt to focus only on what I've asked, and that seems to work.

And just today, I found myself leaving a comment like this: //Note to Claude: Do not refactor the below. It's ugly, but it's supposed to be that way.

Never thought I'd see the day I was leaving comments for my AI agent coworker.

Also that Gemini 2.5 still doesn’t support prompt caching, which is huge for tools like Cline.

It's viable context, context length where is doesn't fall apart, is also much longer.

I do find it likes to subtly reformat every single line thereby nuking my diff and making its changes unusable since I can’t verify them that way, which Sonnet doesn’t do.