Elevated rate of errors for OpenAI models provided by Copilot

Timeline

1. 18 Sep · 17:46 UTC 🟡 Resolved atom

   Sep 17, 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.
   
   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.
   
   Sep 17, 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.
   
   Sep 17, 20:59 UTC
   Investigating - We are investigating reports of degraded performance for Copilot AI Model Providers

2. 17 Sep · 21:49 UTC 🟡 Resolved atom

   Sep 17, 21:49 UTC
   Resolved - This incident has been resolved. Thank you for your patience and understanding as we addressed this issue. A detailed root cause analysis will be shared as soon as it is available.
   
   Sep 17, 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.
   
   Sep 17, 20:59 UTC
   Investigating - We are investigating reports of degraded performance for Copilot AI Model Providers

3. 17 Sep · 21:39 UTC 🟡 Monitoring atom

   Sep 17, 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.
   
   Sep 17, 20:59 UTC
   Investigating - We are investigating reports of degraded performance for Copilot AI Model Providers

4. 17 Sep · 20:59 UTC 🟡 Investigating atom

   Sep 17, 20:59 UTC
   Investigating - We are investigating reports of degraded performance for Copilot AI Model Providers