GitHub Enterprise Cloud US incident

Errors with the Fable 5 Model in Copilot

Minor Resolved View vendor source →

GitHub Enterprise Cloud US experienced a minor incident on August 13, 2026 affecting prod-cus-01 - Copilot AI Model Providers (Copilot AI Model Providers), lasting 1h 3m. The incident has been resolved; the full update timeline is below.

Started
Aug 13, 2026, 02:43 PM UTC
Resolved
Aug 13, 2026, 03:47 PM UTC
Duration
1h 3m
Detected by Pingoru
Aug 13, 2026, 02:43 PM UTC

Affected components

prod-cus-01 - Copilot AI Model Providers (Copilot AI Model Providers)

Update timeline

  1. investigating Aug 13, 2026, 02:43 PM UTC

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

  2. investigating Aug 13, 2026, 02:50 PM UTC

    We are experiencing degraded availability for the Fable 5 model 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 or selecting 'Auto' to continue using Copilot.

  3. investigating Aug 13, 2026, 03:23 PM UTC

    We are seeing modest recovery, but are still experiencing degraded availability for the Fable 5 model 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 or selecting 'Auto'...

  4. investigating Aug 13, 2026, 03:47 PM UTC

    The issues with our upstream model provider have been resolved, and Fable 5 is once again available in Copilot products and IDE surfaces. We will continue monitoring to ensure stability, but mitigation is complete.

  5. resolved Aug 13, 2026, 03:47 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.