Disruption with some GitHub services
GitHub · Last saved provider status: resolved
The last saved event status is not the current service status. Source lists can be incomplete, and disappearance from a source does not confirm recovery. Open the current report or the official source for newer evidence.
Saved event details
- Provider status
- resolved
- Provider impact
- minor
- Provider record created
- 15 Sep 2026, 09:47:15 UTC
- Provider record updated
- 22 Sep 2026, 12:41:35 UTC
- Explicit provider start
- 15 Sep 2026, 09:47:15 UTC
- Explicit provider end
- 15 Sep 2026, 11:17:22 UTC
Affected components reported by the provider
- Copilot AI Model Providers
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These associations describe this event’s reported scope. They do not establish current component availability or verified dependencies.
A record creation time is not necessarily an outage start. Unreported times remain unavailable. We do not calculate downtime from collection times.
Provider updates in saved revisions
Latest first. We show up to 100 distinct updates from the latest 20 saved content revisions. Revised wording at the same provider time is retained separately.
- resolved
On September 15, 2026, between 05:45 and 09:50 UTC, the Claude Fable 5.1 model in GitHub Copilot experienced intermittently degraded availability, with an average error rate of 2.8%. During brief recurring 15 minute periods that recurred every ~45 minutes, availability for Claude Fable 5.1 dropped to a maximum of ~40% before recovering completely. Other Copilot models were not affected. Users could continue to work with a different model or with 'Auto'.<br /><br />The cause was an issue with an upstream model provider that intermittently rejected requests while overloaded. GitHub worked with the provider, who acknowledged and then resolved the underlying issue at 9:50 UTC, after which the model returned to constant normal availability. Once recovery was guaranteed, we resolved the incident at 11:17 UTC.<br /><br />To reduce the chance of recurrence and customer impact, GitHub is reviewing per-model availability alerting and automatic in-product fallback so that requests to a degraded model can shift to a healthy alternative more quickly.
Seen in a saved revision at 06 Oct 2026, 13:58:39 UTC - investigating
The issues with our upstream model provider have been resolved, and Claude Fable 5.1 is once again available in Copilot products and IDE surfaces.<br /><br />We will continue monitoring to ensure stability, but mitigation is complete.
Seen in a saved revision at 06 Oct 2026, 13:58:39 UTC - investigating
We continue to monitor intermittent errors affecting Claude Fable 5.1 in some Copilot products and integrated development environments. Customer-facing metrics have recovered, and we are awaiting confirmation from our upstream provider that the issue will not recur. Customers can select another model or Auto in the meantime.
Seen in a saved revision at 06 Oct 2026, 13:58:39 UTC - investigating
We continue to investigate intermittent errors affecting Claude Fable 5.1 in some Copilot products and integrated development environments. Customers can use another model or select Auto while we monitor the situation.
Seen in a saved revision at 06 Oct 2026, 13:58:39 UTC - investigating
Copilot AI Model Providers is experiencing degraded performance. We are continuing to investigate.
Seen in a saved revision at 06 Oct 2026, 13:58:39 UTC - monitoring
We are investigating degraded availability for Claude Fable 5.1, affecting some Copilot products and integrated development environments. The issue is caused by a problem with our upstream model provider. Customers can use another model or select Auto while we investigate.
Seen in a saved revision at 06 Oct 2026, 13:58:39 UTC - investigating
We are investigating reports of impacted performance for some GitHub services.
Seen in a saved revision at 06 Oct 2026, 13:58:39 UTC