GitHub Copilot outage on Sep 17, 2026: elevated rate of errors for OpenAI models provided by Copilot

Reports during the incident

Every 15 minutes, 19:45 UTC to 23:00 UTC. Grey: normal. Red line: official incident.

19:45 UTC20:59 UTC21:49 UTC23:00 UTC

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GitHub's updates

Quoted from www.githubstatus.com

20:59 UTC
Investigating
We are investigating reports of degraded performance for Copilot AI Model Providers
21:39 UTC
Monitoring
We are experiencing degraded availability for GPT-5.6 Luna, GPT-5.6 Terra, GPT-5.6 Sol, GPT-6 Astra, GPT-5.3-Codex in Copilot products and IDE surfaces. This is due to an issue with an upstream model provider. The provider is working to mitigate the problem and we are monitoring recovery. We recommend choosing another model or selecting 'Auto' to continue using Copilot.
21:49 UTC
Resolved
Between 20:26 and 21:17 UTC on September 17, 2026, GitHub Copilot experienced degradation affecting several GPT models, including GPT-5.6 Luna, GPT-5.6 Terra, GPT-5.6 Sol, GPT-5.3-Codex, and GPT-6 Astra. Users encountered elevated error rates when using these models.<br /><br />The degradation was caused by an issue with an upstream model provider. GitHub engineers detected the issue through automated monitoring and coordinated with the provider. Our automated model-warning system activated in-product warnings for affected models during the incident. Service returned to normal after the provider implemented a mitigation.

Other GitHub Copilot incidents

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31 minIncident with API, Git, and Copilot requests Details

Nov 2

38 minElevated errors on GPT-5.4 Nano Details

Oct 28

1 h 15 minDisruption with some Copilot services Details

All GitHub Copilot incidents

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GitHub's updates

20:59 UTC

Investigating

We are investigating reports of degraded performance for Copilot AI Model Providers

21:39 UTC

Monitoring

We are experiencing degraded availability for GPT-5.6 Luna, GPT-5.6 Terra, GPT-5.6 Sol, GPT-6 Astra, GPT-5.3-Codex in Copilot products and IDE surfaces. This is due to an issue with an upstream model provider. The provider is working to mitigate the problem and we are monitoring recovery. We recommend choosing another model or selecting 'Auto' to continue using Copilot.

21:49 UTC

Resolved

Between 20:26 and 21:17 UTC on September 17, 2026, GitHub Copilot experienced degradation affecting several GPT models, including GPT-5.6 Luna, GPT-5.6 Terra, GPT-5.6 Sol, GPT-5.3-Codex, and GPT-6 Astra. Users encountered elevated error rates when using these models.<br /><br />The degradation was caused by an issue with an upstream model provider. GitHub engineers detected the issue through automated monitoring and coordinated with the provider. Our automated model-warning system activated in-product warnings for affected models during the incident. Service returned to normal after the provider implemented a mitigation.