# No capacity for claude-opus-4-5-thinking (AI Ultra Plan)

**URL:** <https://discuss.ai.google.dev/t/no-capacity-for-claude-opus-4-5-thinking-ai-ultra-plan/119277>\
**Category:** Google Antigravity\
**Tags:** ai\
**Created:** [January 27, 2026, 12:19pm UTC](https://discuss.ai.google.dev/t/no-capacity-for-claude-opus-4-5-thinking-ai-ultra-plan/119277 "2026-01-27T12:19:33Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Konrad\_Seweryn](https://d1dlmcr85iqnpo.cloudfront.net/user_avatar/discuss.ai.google.dev/konrad_seweryn/32/31603_2.png) [@Konrad\_Seweryn](https://discuss.ai.google.dev/u/Konrad_Seweryn)\
**Post date:** [January 27, 2026, 12:19pm UTC](https://discuss.ai.google.dev/t/no-capacity-for-claude-opus-4-5-thinking-ai-ultra-plan/119277/1 "2026-01-27T12:19:33Z")

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I am a paid **AI Ultra** subscriber. The service is currently unusable. I am consistently receiving “Agent terminated due to error” and 503 UNAVAILABLE errors when attempting to use the Claude 4.5 Opus model.

**Technical Details:**

- **Error Code:** `UNAVAILABLE (code 503): No capacity available for model claude-opus-4-5-thinking on the server`

- **Plan:** AI Ultra (Active)

**Troubleshooting Already Performed:**

- Performed `/logout` and re-authenticated.

- Cleared all local application caches.

- Disabled all MCP servers.

Logs:

026-01-27 13:09:35.816 [info] E0127 13:09:35.816676 33251 log.go:362] UNAVAILABLE (code 503): No capacity available for model claude-opus-4-5-thinking on the server: UNAVAILABLE (code 503): No capacity available for model claude-opus-4-5-thinking on the server

2026-01-27 13:09:35.830 [info] I0127 13:09:35.830530 33251 planner\_generator.go:275] Requesting planner with 10 chat messages at model retry attempt 1 and API retry attempt 2

2026-01-27 13:09:46.142 [info] E0127 13:09:46.142440 33251 log.go:362] UNAVAILABLE (code 503): No capacity available for model claude-opus-4-5-thinking on the server: UNAVAILABLE (code 503): No capacity available for model claude-opus-4-5-thinking on the server

2026-01-27 13:09:46.153 [info] I0127 13:09:46.152923 33251 planner\_generator.go:275] Requesting planner with 11 chat messages at model retry attempt 1 and API retry attempt 3

2026-01-27 13:09:46.524 [info] E0127 13:09:46.524391 33251 log.go:362] agent executor **error:** model unreachable: UNAVAILABLE (code 503): No capacity available for model claude-opus-4-5-thinking on the server: UNAVAILABLE (code 503): No capacity available for model claude-opus-4-5-thinking on the server: model api cannot be reached

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<div class="post-metadata">

**Author:** ![Tim-Ahi](https://d1dlmcr85iqnpo.cloudfront.net/user_avatar/discuss.ai.google.dev/tim-ahi/32/32251_2.png) [@Tim-Ahi](https://discuss.ai.google.dev/u/Tim-Ahi)\
**Post date:** [March 15, 2026, 12:19pm UTC](https://discuss.ai.google.dev/t/no-capacity-for-claude-opus-4-5-thinking-ai-ultra-plan/119277/2 "2026-03-15T12:19:58Z")

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Same here - Its been a over a month now - Whats the point of paying for Ultra? Antigravity is just all fluff and when its decide to work - god know what it will do - Its definetly not following the prompt. ITs all claude models and Pro models maybe perform 1-2 tasks before doing the same.

Atleast with Claude Pro Max - You are guarantied to get the service.

Error: HTTP 503 Service Unavailable

Trajectory ID: b0a9cd4d-96d2-4885  
Error: HTTP 503 Service Unavailable  
Sherlog:  
TraceID: 0x482a6217

{  
“error”: {  
“code”: 503,  
“details”: [  
{  
“@type”: “[type.googleapis.com/google.rpc.ErrorInfo”](http://type.googleapis.com/google.rpc.ErrorInfo%E2%80%9D),  
“domain”: “[cloudcode-pa.googleapis.com](http://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”  
}  
}

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<div class="post-metadata">

**Author:** ![Danny\_Pinto](https://d1dlmcr85iqnpo.cloudfront.net/user_avatar/discuss.ai.google.dev/danny_pinto/32/32389_2.png) [@Danny\_Pinto](https://discuss.ai.google.dev/u/Danny_Pinto)\
**Post date:** [March 31, 2026, 4:22am UTC](https://discuss.ai.google.dev/t/no-capacity-for-claude-opus-4-5-thinking-ai-ultra-plan/119277/3 "2026-03-31T04:22:06Z")

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Same issue here not sure what is going on logged in and out