GitHub Enterprise Cloud AU incident

Incident with Copilot GPT-5.1-Codex

Minor Resolved View vendor source →

GitHub Enterprise Cloud AU experienced a minor incident on February 20, 2026 affecting prod-ae-01 - Copilot (Copilot), lasting 1h 41m. The incident has been resolved; the full update timeline is below.

Started
Feb 20, 2026, 10:02 AM UTC
Resolved
Feb 20, 2026, 11:44 AM UTC
Duration
1h 41m
Detected by Pingoru
Feb 20, 2026, 10:02 AM UTC

Affected components

prod-ae-01 - Copilot (Copilot)

Update timeline

  1. investigating Feb 20, 2026, 10:02 AM UTC

    We are investigating reports of degraded performance for Copilot

  2. investigating Feb 20, 2026, 10:02 AM UTC

    We are experiencing degraded availability for the GPT 5.1 Codex model in Copilot Chat, VS Code and other Copilot products. This is due to an issue with an upstream model provider. We are working with them to resolve the issue. Other models are available and working as expected.

  3. investigating Feb 20, 2026, 10:15 AM UTC

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

  4. investigating Feb 20, 2026, 10:36 AM UTC

    We are still experiencing degraded availability for the GPT 5.1 Codex model in Copilot Chat, VS Code and other Copilot products. This is due to an issue with an upstream model provider. We are working with them to resolve the issue.

  5. investigating Feb 20, 2026, 10:50 AM UTC

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

  6. investigating Feb 20, 2026, 11:17 AM UTC

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

  7. investigating Feb 20, 2026, 11:19 AM UTC

    The issues with our upstream model provider have been resolved, and GPT 5.1 Codex is once again available in Copilot Chat and across IDE integrations [VSCode, Visual Studio, JetBrains]. We will continue monitoring to ensure stability, but mitigation is complete.

  8. resolved Feb 20, 2026, 11:41 AM 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.

  9. resolved Feb 20, 2026, 11:44 AM UTC

    Copilot is operating normally.