GitHub outage, 15 September 2026
Disruption with some GitHub services
- Started
- Resolved
- 15 Sept 2026, 11:17 UTC (after 1 h 30 min)
- Impact
- Minor
- Affected
- Copilot AI Model Providers
Last update from GitHub
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 mo...
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