copilot cli error while using opus 4.5 and sonnet 4.5

[westbobhere]

Describe the bug

❌ Error: (query) Execution failed: Error: Failed to get response from the AI model; retried 5 times (total retry wait time: 93.00126834108823 seconds) Last error: CAPIError: 503 {"error":{"message":"HTTP/2 GOAWAY connection terminated","type":"connection_error"}}

Affected version

No response

Steps to reproduce the behavior

No response

Expected behavior

No response

Additional context

No response

[yuyuyuhaoshi]

Happening now to me

[Kross2190]

Unsubscribe SEDATED IN SIN

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On Tue, Apr 7, 2026 at 10:23 PM Hosi YU ***@***.***> wrote: *yuyuyuhaoshi* left a comment (github/copilot-cli#2551) <#2551 (comment)> Happening now to me — Reply to this email directly, view it on GitHub <#2551 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BEUZTQSNYPTEYJMLA5MPBQT4UWZ2PAVCNFSM6AAAAACXPNLRIWVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHM2DEMBTGM4DKNBZGA> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[masteryyh]

same issue #2421

[StackFox]

Getting the same error after I updated the copilot-cli

✗ Execution failed: CAPIError: 400 The requested model is not supported. (Request ID: XXXX:XXXXX:XXXXX:XXXXX:XXXXXXX)

[kalingibbons]

Yup, GitHub Copilot CLI 1.0.21 gives me that error when using the default Claude Sonnet 4.5 model

✗ Execution failed: CAPIError: 400 The requested model is not supported.

[owenng71]

I am having the same issue now. Does anyone know how to solve this?

[Acheron74]

facing the same issue.

[DreamXvan]

I am having the same issue. I’ve tried many methods online, but none of them worked. Could this be an issue with the official service/maintenance? #