[Bug] Ultra AI subscription not working

Google Antigravity
1

Hi everyone! The Ultra AI subscription with the Claude Opus 4.6 model has completely stopped working - the following error pops up constantly:

Error Our servers are experiencing high traffic right now, please try again in a minute.

While previously this error occurred 3-5 times per single model call, the model has now completely stopped responding to requests.

Trajectory ID: 235320fa-4af9-4cd9-b899-baa76af
Error: HTTP 503 Service Unavailable
Sherlog: 
TraceID: 0x1f349baee921
Headers: {"Alt-Svc":["h3=\":443\"; ma=2592000,h3-29=\":443\"; ma=2592000"],"Content-Length":["429"],"Content-Type":["text/event-stream"],"Date":["Sat, 28 Mar 2026 08:20:31 GMT"],"Server":["ESF"],"Server-Timing":["gfet4t7; dur=125"],"Vary":["Origin","X-Origin","Referer"],"X-Cloudaicompanion-Trace-Id":["1f349baee921642f"],"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-opus-4-6-thinking"
        },
        "reason": "MODEL_CAPACITY_EXHAUSTED"
      }
    ],
    "message": "No capacity available for model claude-opus-4-6-thinking on the server",
    "status": "UNAVAILABLE"
  }
}

Is there anything that can be done about this, or should I assume that the Antigravity service has come to an end?

Screen Shot 2026-03-28 в 09.24.20
Screen Shot 2026-03-28 в 09.24.20682×877 40.3 KB

4 Likes
2

Trajectory ID: d5438111-9e63-4602-
Error: agent executor error: could not convert a single message before hitting truncation
(1) attached stack trace
– stack trace:
| google3/third_party/gemini_coder/framework/executor/agentexecutor/agentexecutor.(*AgentExecutor).Run
| third_party/gemini_coder/framework/executor/agentexecutor/agentexecutor.go:312
| google3/third_party/jetski/cortex/cortex.(*CascadeManager).executeHelper.func1
| third_party/jetski/cortex/cascade_manager.go:2027
| google3/third_party/jetski/cortex/utils/background.(*Pool).Go.func2
| third_party/jetski/cortex/utils/background.go:121
| […repeated from below…]
Wraps: (2) agent executor error
Wraps: (3) attached stack trace
– stack trace:
| google3/third_party/jetski/cortex/chatconverters/chatconverters.init
| third_party/jetski/cortex/chatconverters/trajectory_chat_converter.go:47
| runtime.doInit1
| third_party/go/gc/src/runtime/proc.go:8138
| runtime.doInit
| third_party/go/gc/src/runtime/proc.go:8105
| runtime.main
| third_party/go/gc/src/runtime/proc.go:261
| runtime.goexit
| third_party/go/gc/src/runtime/asm_amd64.s:1774
Wraps: (4) could not convert a single message before hitting truncation
Error types: (1) *withstack.withStack (2) *errutil.withPrefix (3) *withstack.withStack (4) *errutil.leafError