Is Claude down? › Outage history › Sep 22, 2026
Claude partial outage on Sep 22, 2026: what happened
On Sep 22, 2026, the Claude status page reported "Elevated errors for multiple models". About 1 hour 38 min: from Sep 22, 2026, 00:57 UTC to Sep 22, 2026, 02:35 UTC, by the official start and resolution times.
Claude right now
At our last refresh (Oct 22, 2026, 12:35 UTC) Claude was up: All Systems Operational.
- Started
- Sep 22, 2026, 00:57 UTC
- Resolved
- Sep 22, 2026, 02:35 UTC
- Duration
- 1 hour 38 min
- Official impact
- Major
- Affected
- claude.ai, Claude API (api.anthropic.com), Claude Code, Claude Cowork
- Source
- Elevated errors for multiple models on the Claude status page
The Claude status page rated the impact "Major": a partial outage. Some parts or some users were affected; it was not a complete outage.
What caused the Claude partial outage?
The Claude status page has not published a cause. When it identified the problem at 01:17 UTC on Sep 22, 2026, it said: "We have identified the cause of elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5 and are working on a fix. We will provide an update as soon as possible."
When was it fixed?
The Claude status page marked it resolved at Sep 22, 2026, 02:35 UTC, 1 hour 38 min after it started. A fix was in place and being monitored from Sep 22, 2026, 02:11 UTC. Its resolution note: "This issue has been resolved. Impact occurred from 5:50pm PT / 00:50 UTC to 7:10pm PT / 02:10 UTC."
Timeline of official updates
Every update the Claude status page posted, oldest first. Times are UTC.
Sep 22, 2026, 00:57 UTC investigating
We are investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5. We will provide an update as soon as possible.
Sep 22, 2026, 01:17 UTC identified
We have identified the cause of elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5 and are working on a fix. We will provide an update as soon as possible.
Sep 22, 2026, 01:35 UTC identified
We are continuing to work to resolve errors affecting some models. At this time, requests to Claude Fable 5 and 5.1 and Mythos 5 and 5.1 have returned to normal success rates. We are working to resolve remaining errors affecting Claude Opus 5, and will provide an additional update shortly.
Sep 22, 2026, 02:11 UTC monitoring
We have seen success rates return to normal across affected models, and are monitoring closely to ensure no further issues.
Sep 22, 2026, 02:35 UTC resolved
This issue has been resolved. Impact occurred from 5:50pm PT / 00:50 UTC to 7:10pm PT / 02:10 UTC.
The same incident was listed for Claude Cowork, Claude Code, which share Claude's status page.
Claude partial outage questions
What caused the Claude partial outage on Sep 22, 2026?
The Claude status page has not published a cause. When it identified the problem (Sep 22, 2026, 01:17 UTC) it said: "We have identified the cause of elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5 and are working on a fix. We will provide an update as soon as possible."
When was the Claude partial outage on Sep 22, 2026 fixed?
The Claude status page marked it resolved at Sep 22, 2026, 02:35 UTC, 1 hour 38 min after it started. A fix was in place and being monitored from Sep 22, 2026, 02:11 UTC. Its resolution note: "This issue has been resolved. Impact occurred from 5:50pm PT / 00:50 UTC to 7:10pm PT / 02:10 UTC."
How long did the Claude partial outage last?
About 1 hour 38 min: from Sep 22, 2026, 00:57 UTC to Sep 22, 2026, 02:35 UTC, by the official start and resolution times.
Was Claude completely down?
No. The Claude status page rated the impact "Major": a partial outage. Some parts or some users were affected; it was not a complete outage. The affected parts listed were: claude.ai, Claude API (api.anthropic.com), Claude Code, Claude Cowork.
Which parts of Claude were affected?
The Claude status page listed: claude.ai, Claude API (api.anthropic.com), Claude Code, Claude Cowork.
Other recent Claude incidents
- Elevated errors affecting Connectors Oct 22, 2026, 03:50 UTC, 4 hours 17 min
- Degraded performance for Claude Fable 5 Oct 21, 2026, 19:49 UTC, 40 minutes
- Issue with spend limits Oct 7, 2026, 21:23 UTC, duration not stated
- Elevated errors on platform.claude.com Oct 7, 2026, 13:25 UTC, 6 days 5 hours
- Elevated errors loading usage data on platform.claude.com Oct 7, 2026, 01:20 UTC, 1 hour 13 min
- Elevated errors for Claude Opus 5.5 Oct 6, 2026, 12:24 UTC, 19 minutes
Full Claude outage history and biggest outages → · Recent outages across all services →
Quotes are the Claude status page's own words, from the official incident. Is It Up or Down is independent and not affiliated with Claude. Times are UTC.