What I usually try to test with is try to get them do full scalable SaaS application from scratch... It seemed very impressive in how it did the early code organization using Antigravity, but then at some point, all of sudden it started really getting stuck and constantly stopped producing and I had to trigger continue, or babysit it. I don't know if I could've been doing something better, but that was just my experience. Seemed impressive at first, but otherwise at least vs Antigravity, Codex and Claude Code scale more reliably.

Just early anecdote from trying to build that 1 SaaS application though.