How I Fixed the "Select Model" Loading Loop in Google’s Antigravity IDE

What Didn't Work: The Reinstall Trap

My first instinct was to uninstall and start over. I deleted the app, redownloaded the installer, and went through the setup again. 15 minutes wasted. The issue persisted because the app caches your session data locally. Simply reinstalling doesn't clear the "stuck" authentication token that's preventing the model list from populating.

The 30-Second Fix (New UI Version)

In the latest version of Antigravity, the settings have moved. You no longer need to hunt for a tiny gear icon in the corner. Follow these steps to "unstick" your session:

1. Locate your Profile: Look at the top right corner of the IDE window. You will see your name (e.g., "John Doe").
2. Open the Account Menu: Click on your name to open the Google Auth dropdown.
3. Sign Out: Click the Sign Out button.
4. The Fresh Start: Close the IDE completely. Re-open it and sign back in with your Google account.

As soon as I logged back in, the model list populated instantly. I could switch between Gemini 3 Flash and Pro without any lag.

Why Is This Happening?

Antigravity uses a local "token" to talk to Google’s backend. If you updated the app recently or if your session expired while the app was closed, the UI gets confused. It thinks you’re logged in, but the backend rejects the request, resulting in that infinite loading loop. Signing out forces the app to generate a brand-new, valid token.

Plan B: The "Deep Clean"

If signing out doesn't work, you need to clear the cache manually:

• Windows: Press Win + R, type %APPDATA%, and delete the Antigravity folder.
• Mac: Navigate to ~/Library/Application Support/Antigravity and clear the contents.

Final Thoughts

The new UI is much cleaner, but these early-stage bugs are part of the "AI Hustle." Once you get past the login loop, the speed of Gemini 3 inside the IDE is a game-changer for building automation agents.