Gemini CLI is a solid alternative to Claude Code. The limits are restrictive, though. If you're paying for Max, I can't imagine Gemini CLI will take you very far.
Well, I use Gemini a lot (because it's one of three allowed families), but tbh it's pretty bad. I mean, it can get the job done but it's exhausting. No pleasure in using it.
I tried Gemini like a year or so ago, and I gave up after it directly refused to write me a script and instead tried to tell me how to learn to code. I do not make this up.
Gemini CLI regularly gets stuck failing to do anything after declaring its plan to me. There seems to be no way to un-lock it from this state except closing and reopening the interface, losing all its progress.
Kilocode is a good alt as well. You can plug into OpenRouter or Kilocode to access their models.
Gemini CLI isn't even close to the quality of Claude Code as a coding harness. Codex and even OpenCode are much better alternatives.