what harness or plan are you using 3.8 flash with?

I’m using antigravity. I’m still on the AI Pro plan for the promotional $5/month.

where is this promotion?

If you don’t have a plan yet, log in to antigravity. There will be a button “upgrade plan” somewhere. Sometimes it pops up and otherwise lookup in settings > account. There should be some button that says upgrade. Clicking that brought me to the google studio ai page which offered the 20-something plan for €5/month.

anti-gravity with gemini 3.8 or gtfo