Is anyone else experiencing the same issue? Yesterday, I still had several agent model options in Antigravity, ranging from Flash Lite, Flash, and Pro. However, today I can’t select the Gemini 3.1 Pro model because it disappeared from the options. Does anyone know what might be causing this?
The same thing for more. And it’s not just happened but started couple weeks ago when I’ve been on Plus subscription
Same thing, the Gemini 3.1 Pro model suddenly disappeared
Hi @all
Gemini 3.1 Pro has been retired and is no longer selectable in Gemini Enterprise. There is no supported way to continue using this model.
We recommend transitioning to Gemini 3.8 Flash. To help bridge any performance differences and achieve similar depth:
- Increase reasoning capacity: Use the highest available thinking setting for complex, multi-step, or analytical tasks.
- Refine key prompts and Gems: Newer generations interpret instructions differently. Adding explicit structural constraints, requesting step-by-step logic, or supplying few-shot examples will yield significantly better output.
We recognize that Flash behaves differently from 3.1 Pro across certain tasks, and your feedback is essential as we continue tuning performance.
Does Google intend to introduce a replacement model, or are we supposed to switch to standard Gemini—where the 3.1 Pro version is still available—or should we all just cancel our subscriptions and move to a place where companies don’t take steps backward by several years?