[HELP/ULTRA] Has anyone found a fix for Error 503 "Model Capacity Exhausted"?

Google Antigravity
1

Hi everyone,

I’m reaching out because I’m at a complete dead end. I just upgraded to the Gemini Ultra plan to use Claude Opus 4.6 on Antigravity, but I’m constantly getting hit with the following error:

Error: HTTP 503 Service Unavailable Reason: MODEL_CAPACITY_EXHAUSTED Domain: cloudcode-pa.googleapis.com

The situation so far:

  • Paid User: I just purchased the Ultra plan, so this isn’t a “free tier” limitation issue.

  • Researched: I’ve spent a significant amount of time digging through existing threads and forums, but I haven’t found a single working solution or workaround.

  • Zero Support: I cannot find any direct support channels—no tickets, no email, and no official dev contact for the Antigravity team.

It’s incredibly frustrating to pay for a premium service and be met with a “Server Unavailable” message immediately.

Has anyone here managed to bypass this or found a way to actually get a response from the support team? Any advice or even a nudge in the right direction would be greatly appreciated.

Technical Details for reference:

  • Trajectory ID: `489758c2-1e7c-4cd0-9f60-9c8b70285

  • TraceID: `0xe2daa18fbb5b8

Thanks in advance for any help!

2

To clarify, I am not just a standard user. Beyond the Gemini Ultra subscription, my account is heavily integrated with AI Studio & Gemini API for development. My billing for April alone was nearly $760 . Given this level of investment, it’s extremely disappointing to be met with zero support and persistent server errors. If anyone from the Antigravity team or Google Cloud sees this, please look into why high-tier accounts are being hit with capacity limits on Claude Opus 4.6.