The thing that finally pushed me over the edge was a 401 at 1am. Anthropic key rotated. Claude Code dead. Three terminals open, a half-finished refactor, and now I'm digging through a password manager looking for the right ANTHROPIC_API_KEY to paste into a shell config so my CLI tool can keep talking to a model. Then it hit me: I was already logged into Google's Antigravity in another tab. And Antigravity hands out claude-sonnet-4-6 and claude-opus-4-6 like it's nothing. So why was I paying Anthropic again? What Antigravity Actually Is If you haven't bumped into it yet — Antigravity is Google's enterprise developer platform, built on top of Google Cloud Code Assist. The interesting part isn't that it gives you Gemini. The interesting part is that it gives you Claude .…