Always show Agent terminated due to error -> all models in antigravity not working but GPT-OSS is working

Trajectory ID: 16a5fea7-2706-40bb-8904-8ff37fd
Error: HTTP 503 Service Unavailable
Sherlog:
TraceID: 0x201fd327f1805
Headers: {“Alt-Svc”:[“h3=”:443"; ma=2592000,h3-29=“:443”; ma=2592000"],“Content-Length”:[“415”],“Content-Type”:[“text/event-stream”],“Date”:[“Tue, 05 May 2026 13:05:08 GMT”],“Server”:[“ESF”],“Server-Timing”:[“gfet4t7; dur=656”],“Vary”:[“Origin”,“X-Origin”,“Referer”],“X-Cloudaicompanion-Trace-Id”:[“201fd327f1805f8b”],“X-Content-Type-Options”:[“nosniff”],“X-Frame-Options”:[“SAMEORIGIN”],“X-Xss-Protection”:[“0”]}

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

I’m Ultra User…seems this issue already last for one month…why??? Google want us using GPT-OSS?