Gemini CLI was utter shit and always had delayed model release on top of it. I'm not kidding when 1 hour automated vibe-coding led to an agent 30% cheaper and faster on 1:1 tasks with the SAME Gemini models (re-ran on 50 past tasks), genuinely shameful that Google even released this, it was so buggy, trapped in infinite loops as well and so-on.

Antigravity is a whole different product, the only way I use it currently is to abstract the OAuth mechanism so we can leverage Google subscriptions within our own agents.