Error: "UNAVAILABLE (code 503): No capacity available for model gemini-3.1-pro-high on the server"

Gemini API
,
1

I see the error in the console “Outputs”:

`2026-03-05 14:24:32.204 [info] I0305 14:24:32.201517 36576 planner_generator.go:323] Encountered retryable api error. retrying in 5s. Error (The model is currently unreachable.): UNAVAILABLE (code 503): No capacity available for model gemini-3.1-pro-high on the server: UNAVAILABLE (code 503): No capacity available for model gemini-3.1-pro-high on the server

2026-03-05 14:24:37.214 [info] E0305 14:24:37.214106 36576 log.go:380] UNAVAILABLE (code 503): No capacity available for model gemini-3.1-pro-high on the server: UNAVAILABLE (code 503): No capacity available for model gemini-3.1-pro-high on the server

2026-03-05 14:24:37.247 [info] I0305 14:24:37.247387 36576 planner_generator.go:288] Requesting planner with 143 chat messages at model retry attempt 1 and API retry attempt 2

2026-03-05 14:24:43.010 [info] I0305 14:24:43.010434 36576 http_helpers.go:123] URL: https://daily-cloudcode-pa.googleapis.com/v1internal:streamGenerateContent?alt=sse Trace: 0xfa789ece376f8784

2026-03-05 14:25:05.024 [info] I0305 14:25:05.024303 36576 planner_generator.go:288] Requesting planner with 147 chat messages at model retry attempt 1 and API retry attempt 1

2026-03-05 14:25:10.288 [info] I0305 14:25:10.286905 36576 http_helpers.go:123] URL: https://daily-cloudcode-pa.googleapis.com/v1internal:streamGenerateContent?alt=sse Trace: 0x87398e85b8dafd77

2026-03-05 14:25:12.975 [info] (Antigravity) 2026-03-05 14:25:12.975 [INFO]: [Terminal] Command completed: dotnet test exit code 1

2026-03-05 14:25:13.020 [info] I0305 14:25:13.020289 36576 planner_generator.go:288] Requesting planner with 149 chat messages at model retry attempt 1 and API retry attempt 1

2026-03-05 14:25:20.547 [info] I0305 14:25:20.547054 36576 http_helpers.go:123] URL: https://daily-cloudcode-pa.googleapis.com/v1internal:streamGenerateContent?alt=sse Trace: 0x3d39a5a1eee930a6

2026-03-05 14:25:22.002 [info] E0305 14:25:22.002203 36576 interceptor.go:74] /exa.language_server_pb.LanguageServerService/SendActionToChatPanel (unknown): can’t send message because channel is full`

It’s not clear, what should I do as a user in this case? Why IDE doesn’t show to a user any warnings and recommendations?

2

In our project, where we validate documents using the Gemini API, we also had problems today: 2026-02-05 10:10:54 UTC-5

We use gemini-3-flash-preview model

[2026-02-25 15:29:19] production.WARNING: Gemini API Error: {
  "error": {
    "code": 503,
    "message": "This model is currently experiencing high demand. Spikes in demand are usually temporary. Please try again later.",
    "status": "UNAVAILABLE"
  }
}
3

“message”: “No capacity available for model gemini-3.1-pro-high on the server”,

"status": "UNAVAILABLE"