ARCHIVED OFFICIAL INCIDENT

Elevated errors on Fable 5 due to upstream provider

GitHub · Last saved provider status: resolved

Current service report →
This is historical evidence.

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Saved event details

Provider status
resolved
Provider impact
major
Provider record created
24 Aug 2026, 07:12:05 UTC
Provider record updated
27 Aug 2026, 14:51:10 UTC
Explicit provider start
24 Aug 2026, 07:12:05 UTC
Explicit provider end
24 Aug 2026, 07:58:41 UTC

Affected components reported by the provider

  • Copilot AI Model Providers cnnb39dkkk82

These associations describe this event’s reported scope. They do not establish current component availability or verified dependencies.

A record creation time is not necessarily an outage start. Unreported times remain unavailable. We do not calculate downtime from collection times.

Provider updates in saved revisions

Latest first. We show up to 100 distinct updates from the latest 20 saved content revisions. Revised wording at the same provider time is retained separately.

  1. resolved

    On August 24th, 2026, between approximately 06:35 and 07:25 UTC, the Copilot service experienced a degradation of the Claude Fable 5 model due to an issue with our upstream provider. Users encountered elevated error rates when using Claude Fable 5, with requests sometimes failing mid-response. No other models were impacted.<br /><br />The issue was resolved by a mitigation put in place by our provider. GitHub is working with our provider to further improve the resiliency of the service to prevent similar incidents in the future.

    Seen in a saved revision at 06 Oct 2026, 13:58:39 UTC
  2. investigating

    We are experiencing degraded availability for the Fable model in Copilot products and IDE surfaces. This is due to an issue with the upstream model provider. While we work with them to resolve the issue, we recommend choosing another model or selecting 'Auto' to continue using Copilot.

    Seen in a saved revision at 06 Oct 2026, 13:58:39 UTC
  3. investigating

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

    Seen in a saved revision at 06 Oct 2026, 13:58:39 UTC