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

I was hyped to finally try out Antigravity, the new AI-powered IDE that everyone in the automation space has been talking about. I downloaded the installer, ran the setup, and opened the dashboard, ready to start building my next agent workflow.

But then, I hit a wall.

Right there in the chat interface, I was greeted with a frustrating error: "Select Model to Send Message."

I clicked the dropdown menu to pick a model (like Gemini or GPT-4), but nothing happened. It just kept spinning. The dreaded infinite load. The interface was stuck saying "No Model Selected," and no matter how many times I clicked "Planning" or "Fast" mode, the tool refused to connect.

The Failed Attempt: Reinstalling

My first instinct was the classic "turn it off and on again." I uninstalled the entire application and downloaded it again. I figured maybe the installation file was corrupted.

I spent 15 minutes setting it up again, launched it, and... same issue. The model list was still empty, and the spinner was still spinning. It was incredibly annoying. I realized that simply reinstalling wasn't clearing the cached data or the stuck session that was causing the glitch.

The Solution: The 30-Second Fix

Before diving into complex terminal commands or deleting system folders, I decided to try something much simpler. And guess what? It worked instantly.

If you are facing this loop, here is exactly what fixed it for me:

1. Go to Settings: Look for the gear icon in the bottom left corner of the Antigravity window.
2. Sign Out: Navigate to the Account section and click Sign Out.
3. Restart & Sign In: I closed the app completely, opened it back up, and signed in with my Google account again.

That was it. As soon as I logged back in, the "Select Model" dropdown populated instantly. I could finally see the model list, switch between Planning and Fast modes, and the agent was ready to execute tasks.

Why Does This Happen?

It seems like Antigravity caches your authentication token. If that token expires or gets "stuck" during the initial setup, the frontend (what you see) can't talk to the backend (where the AI lives). Reinstalling doesn't always clear this token, which is why the error persists even after a fresh install.

Plan B: If That Doesn't Work

While the Sign Out/Sign In method worked for me, I did some research on developer forums just in case it happens again. If the logout method fails for you, try these two steps:

• The "Deep Clean": Press Win + R, type %APPDATA%, and delete the Antigravity folder. This forces a hard reset of all local data.
• Check your VPN: Since this tool relies on heavy cloud requests (likely to Vertex AI), some ISPs might throttle the connection. Toggling a VPN on or off can sometimes unstick the network request.

Over To You

Now that my environment is running, I'm back to building agents.

Have you faced this issue with Antigravity or other AI IDEs like Cursor or Windsurf? Did the Sign Out trick work for you, or did you have to do a deep clean? Let me know in the comments—I’d love to hear how you’re handling these early-stage bugs!