Disruption with some Copilot services

Updates timeline

1. Investigating Oct 28, 02:12 PM UTC

   We are investigating reports of impacted performance for some GitHub services.

2. Investigating Oct 28, 02:15 PM UTC

   We are experiencing issues with upstream model providers resulting in a degraded experience across Copilot services. The team is actively investigating the issue.

3. Investigating Oct 28, 02:33 PM UTC

   We are experiencing degraded availability for the GPT-5.3-Codex, GPT-5.6 Luna, GPT-6.1 Sol, GPT-5.6 Terra, GPT-6 Luna, and MAI Code 1.1 Flash models in Copilot products and IDE surfaces. This is due to an issue with an upstream model provider. While we work with them to resolve the issue we recommend choosing another model to continue using Copilot.

4. Investigating Oct 28, 02:55 PM UTC

   We are experiencing degraded availability for the GPT-5.3-Codex, GPT-5.6 Luna, GPT-6.1 Sol, GPT-5.6 Terra, GPT-6 Luna, and MAI Code 1.1 Flash models in Copilot products and IDE surfaces. We have identified the root cause and working to apply a mitigation. While we work to resolve the issue we recommend choosing another model to continue using Copilot.

5. Investigating Oct 28, 03:15 PM UTC

   We have applied the mitigation and are seeing signs of recovery. We will continue to monitor and expect full resolution soon.

6. Investigating Oct 28, 03:24 PM UTC

   Copilot is experiencing degraded performance. We are continuing to investigate.

7. Monitoring Oct 28, 03:26 PM UTC

   The degradation affecting Copilot has been mitigated. We are monitoring to ensure stability.

8. Resolved Oct 28, 03:28 PM UTC

   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.