[Backfill] US - Claude Opus 4.6 Fast not appearing for some Copilot users
At a glance · GitHub's status
ResolvedLasted 40 min
- First posted
- on GitHub Enterprise Cloud data residency status
- Ended
- · marked resolved
- Affects
- GitHub Enterprise Cloud US
- Edited
- Not since we first saw it
- Source
- GitHub Enterprise Cloud data residency status · checked 4 min ago
In short
GitHub reported a partial outage affecting GitHub Enterprise Cloud US, starting 20:31 UTC on 3 Mar. GitHub marked it resolved at 21:11 UTC after 40 min. GitHub has since published a post-incident report.
GitHub says
GitHub's latest update, , in short excerpts.
On March 3, 2026, between 19:44 UTC and 21:05 UTC, some GitHub Copilot users reported that the Claude Opus 4.6 Fast model was no longer…
Timeline
Times in UTC, GitHub's own where it gives them.
3 Mar
GitHubFirst public postFrom GitHub's own incident history, before our archive started.
+40 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 US
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 March 3, 2026, between 19:44 UTC and 21:05 UTC, some GitHub Copilot users reported that the Claude Opus 4.6 Fast model was no longer…
Resolved ·
This incident has been resolved.
Investigating ·
We believe that all expected users still have access to Claude Opus 4.6.
Investigating ·
We are investigating reports of degraded performance for Copilot
Last updated