Agent terminated due to error, ULTRA plan (HTTP 500)

I use the Ultra Business plan, and since Gemini 3.1 was released, in addition to being extremely slow, I almost always get this error:

Agent terminated due to error
You can prompt the model to try again or start a new conversation if the error persists.
Error: HTTP 500 Internal Server Error

I understand that Antigravity is still in preview, but all these bugs are unacceptable given the cost of the plan.

same same same…….i posted similar post about this problem.

Yeah, in most cases it’s an issue with their servers and their capacity to handle traffic from all the subscribers.

Same. Ultra plan and cannot complete my work, it is unbearable to use, have to constantly click “retry” over and over to do the most simple task. There is only so long I can put up with this until I move to a Claude Code plan.

{
“error”: {
“code”: 503,
“details”: [
{
“@type”: “``type.googleapis.com/google.rpc.ErrorInfo”``,
“domain”: “``cloudcode-pa.googleapis.com``”,
“metadata”: {
“model”: “claude-opus-4-6-thinking”
},
“reason”: “MODEL_CAPACITY_EXHAUSTED”
}
],
“message”: “No capacity available for model claude-opus-4-6-thinking on the server”,
“status”: “UNAVAILABLE”
}
}

Hey All,

Thank you for bringing this to our attention. We have escalated the issue to our internal teams for a thorough investigation.

To ensure our engineering team can investigate and resolve these issues effectively, we highly recommend filing bug reports directly through the Antigravity in-app feedback tool. You can do this by navigating to the top-right corner of the interface, clicking the Report Issue icon and selecting Feedback Type.

1 Like

@chunduriv This has been going on for days now.

Even your bug report tool is broken right now. Shockingly poor product and service from Google.

3 Likes