GitHub Enterprise Cloud US incident

Disruption with GPT 5.3 Codex

Minor Resolved View vendor source →

GitHub Enterprise Cloud US experienced a minor incident on July 20, 2026 affecting prod-cus-01 - Copilot AI Model Providers (Copilot AI Model Providers), lasting 2h 33m. The incident has been resolved; the full update timeline is below.

Started
Jul 20, 2026, 04:03 PM UTC
Resolved
Jul 20, 2026, 06:37 PM UTC
Duration
2h 33m
Detected by Pingoru
Jul 20, 2026, 04:03 PM UTC

Affected components

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

Update timeline

  1. investigating Jul 20, 2026, 04:03 PM UTC

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

  2. investigating Jul 20, 2026, 04:04 PM UTC

    We are investigating GPT Codex 5.3 performance.

  3. investigating Jul 20, 2026, 04:39 PM UTC

    We identified that an upstream provider is returning errors for GPT 5.3 Codex requests, causing some users to experience failed or interrupted responses. Traffic is being automatically rerouted to mitigate impact. We are working with the upstream provider to resolve the underlying issue. We...

  4. investigating Jul 20, 2026, 05:21 PM UTC

    The upstream provider continues to return intermittent errors for GPT 5.3 Codex requests. Some users may experience failed or interrupted responses when using this model. Traffic continues to be automatically rerouted to reduce impact, and we are actively working with the upstream provider on a...

  5. investigating Jul 20, 2026, 06:25 PM UTC

    We are seeing signs of sustained recovery from the upstream provider for GPT 5.3 Codex requests. Requests are succeeding as expected. We are awaiting confirmation from the provider that the issue is fully mitigated before resolving this incident.

  6. resolved Jul 20, 2026, 06:37 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.