Errors with the Fable 5 Model in Copilot
At a glance · GitHub's status
ResolvedLasted 1 h 3 min
- First posted
- on GitHub Enterprise Cloud data residency status
- Ended
- · marked resolved
- Affects
- GitHub Enterprise Cloud Japan
- Edited
- Not since we first saw it
- Source
- GitHub Enterprise Cloud data residency status · checked 1 min ago
In short
GitHub reported a partial outage affecting GitHub Enterprise Cloud Japan, starting 14:43 UTC on 13 Aug. GitHub marked it resolved at 15:47 UTC after 1 h 3 min. GitHub has since published a post-incident report.
GitHub says
GitHub's latest update, , in short excerpts.
On August 13th, 2026, between approximately 14:06 and 15:47 UTC, the Copilot service experienced a degradation of the Claude Fable 5 model due to an…
Timeline
Times in UTC, GitHub's own where it gives them.
13 Aug
GitHubFirst public postFrom GitHub's own incident history, before our archive started.
+1 h 4 min
GitHubResolved
What GitHub changed
GitHub adds updates to its incidents. We save every version (checked every minute) and list what changed. Quotes are short excerpts. The full text is on GitHub's page.
One version so far. If GitHub edits it, each change shows here with what was removed and added.
First version we captured ·
As first seen: postmortem · 1 service
- Status
- postmortem
- Services
- GitHub Enterprise Cloud Japan
Seen by us · GitHub's timestamp · GitHub's page
Affected services
Official updates
Posted by GitHub Enterprise Cloud data residency status, newest first. The newest are quoted in their first sentence; the full text of each is on GitHub's page.
Post-incident report ·
On August 13th, 2026, between approximately 14:06 and 15:47 UTC, the Copilot service experienced a degradation of the Claude Fable 5 model due to an…
Resolved ·
This incident has been resolved.
Investigating ·
The issues with our upstream model provider have been resolved, and Fable 5 is once again available in Copilot products and IDE surfaces.
Investigating ·
We are seeing modest recovery, but are still experiencing degraded availability for the Fable 5 model in Copilot products and IDE surfaces.
Investigating ·
We are experiencing degraded availability for the Fable 5 model in Copilot products and IDE surfaces.
Investigating ·
We are investigating reports of degraded performance for Copilot AI Model Providers
Last updated