I don't know if it's Gemini CLI or Gemini 2.5 Pro, but the combination is not even comparable to Claude Code with Sonnet. I was starting with these agent tools several weeks ago, so it was very tempting to use Gemini, instead of paying for Claude Pro, but the difference is huge. In my experience, Gemini was very quick to get stuck in debugging loop, fixing something "one last time" over and over again. Or it got into writing code, despite my explicitly saying not to do so. I'm still trying to figure out if I could use Gemini for something, but every time I try it, I regret it. Claude Code with GLM-4.5 is a good alternative to paying for Claude Pro, it's not as good as Sonnet, but close.