Opus 4.6 constantly has errors

Im one of those poor pro subscription users, stuck and dissapointed with Antigravity, Tried to use Antigravity again after a few days, since there is support for Opus 4.6. Yet again ended up disapointed with persistent errors . Please fix it guys, error trace below

Trajectory ID: 36973d4a-6c5c-49c6-875a-f50e1bfa073f
Error: model unreachable: UNAVAILABLE (code 503): No capacity available for model claude-opus-4-6-thinking on the server: UNAVAILABLE (code 503): No capacity available for model claude-opus-4-6-thinking on the server: model api cannot be reached
(1) attached stack trace
– stack trace:
| google3/third_party/gemini_coder/framework/generator/generator.(*PlannerGenerator).generateWithModelOutputRetry
| third_party/gemini_coder/framework/generator/planner_generator.go:194
| google3/third_party/gemini_coder/framework/generator/generator.(*PlannerGenerator).Generate
| third_party/gemini_coder/framework/generator/planner_generator.go:95
| google3/third_party/gemini_coder/framework/executor/executor.(*Executor).Execute
| third_party/gemini_coder/framework/executor/executor.go:303
| google3/third_party/jetski/cortex/cortex.(*CascadeManager).executeHelper.func1
| third_party/jetski/cortex/cascade_manager.go:1558
| […repeated from below…]
Wraps: (2) secondary error attachment
| UNAVAILABLE (code 503): No capacity available for model claude-opus-4-6-thinking on the server: UNAVAILABLE (code 503): No capacity available for model claude-opus-4-6-thinking on the server
| (1) tags: map[stream_receive_count:0 streaming_duration:0s]
| Wraps: (2) attached stack trace
| – stack trace:
| | google3/third_party/gemini_coder/framework/generator/generator.(*streamResponseHandler).processStream
| | third_party/gemini_coder/framework/generator/stream_handler.go:338
| | google3/third_party/gemini_coder/framework/generator/generator.(*PlannerGenerator).attemptGenerate
| | third_party/gemini_coder/framework/generator/planner_generator.go:437
| | google3/third_party/gemini_coder/framework/generator/generator.(*PlannerGenerator).generateWithAPIRetry
| | third_party/gemini_coder/framework/generator/planner_generator.go:278
| | google3/third_party/gemini_coder/framework/generator/generator.(*PlannerGenerator).generateWithModelOutputRetry
| | third_party/gemini_coder/framework/generator/planner_generator.go:154
| | google3/third_party/gemini_coder/framework/generator/generator.(*PlannerGenerator).Generate
| | third_party/gemini_coder/framework/generator/planner_generator.go:95
| | google3/third_party/gemini_coder/framework/executor/executor.(*Executor).Execute
| | third_party/gemini_coder/framework/executor/executor.go:303
| | google3/third_party/jetski/cortex/cortex.(*CascadeManager).executeHelper.func1
| | third_party/jetski/cortex/cascade_manager.go:1558
| | google3/third_party/jetski/cortex/cortex.(*CascadeManager).executeHelper.func2
| | third_party/jetski/cortex/cascade_manager.go:1676
| | runtime.goexit
| | third_party/go/gc/src/runtime/asm_arm64.s:1447
| Wraps: (3) UNAVAILABLE (code 503): No capacity available for model claude-opus-4-6-thinking on the server
| Wraps: (4) UNAVAILABLE (code 503): No capacity available for model claude-opus-4-6-thinking on the server
| Error types: (1) *go_utils.withTags (2) *withstack.withStack (3) *errutil.withPrefix (4) *utils.HTTPError
Wraps: (3) model unreachable: UNAVAILABLE (code 503): No capacity available for model claude-opus-4-6-thinking on the server: UNAVAILABLE (code 503): No capacity available for model claude-opus-4-6-thinking on the server
Wraps: (4) attached stack trace
– stack trace:
| google3/third_party/jetski/cortex/shared/shared.init
| third_party/jetski/cortex/shared/interfaces.go:21
| runtime.doInit1
| third_party/go/gc/src/runtime/proc.go:8105
| runtime.doInit
| third_party/go/gc/src/runtime/proc.go:8072
| runtime.main
| third_party/go/gc/src/runtime/proc.go:258
| runtime.goexit
| third_party/go/gc/src/runtime/asm_arm64.s:1447
Wraps: (5) model api cannot be reached
Error types: (1) *withstack.withStack (2) *secondary.withSecondaryError (3) *errutil.withPrefix (4) *withstack.withStack (5) *errutil.leafError

2 Likes

Yeah this has been an ongoing issue for like 10 hours now. Still no word from Google or Antigravity’s developers just like usual…

1 Like

Google is ignoring us, I’m quitting Antigravity.

Hey All,

A 503 error (UNAVAILABLE) indicates that the service is temporarily overloaded or experiencing a capacity constraint. This is common during peak usage hours, particularly with long context requests. The best immediate step is to wait some time and try again.

Could you please confirm if you are still facing this issue while using the Claude Opus 4.6 (Thinking) model?