Is Claude down? › Outage history › Aug 13, 2026
Claude partial outage on Aug 13, 2026: what happened
On Aug 13, 2026, the Claude status page reported "Elevated errors for Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5". About 1 hour 35 min: from Aug 13, 2026, 14:33 UTC to Aug 13, 2026, 16:08 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
- Aug 13, 2026, 14:33 UTC
- Resolved
- Aug 13, 2026, 16:08 UTC
- Duration
- 1 hour 35 min
- Official impact
- Major
- Affected
- claude.ai, Claude API (api.anthropic.com), Claude Code, Claude Cowork
- Source
- Elevated errors for Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5 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. Its updates describe the symptoms only.
When was it fixed?
The Claude status page marked it resolved at Aug 13, 2026, 16:08 UTC, 1 hour 35 min after it started. Its resolution note: "The issue affecting Claude Mythos 5 and Claude Fable 5 has been resolved."
Timeline of official updates
Every update the Claude status page posted, oldest first. Times are UTC.
Aug 13, 2026, 14:33 UTC investigating
We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5. We will provide an update as soon as possible.
Aug 13, 2026, 15:44 UTC investigating
We are investigating elevated errors on requests to Claude Mythos 5 and Claude Fable 5. We will provide an update as soon as possible.
Aug 13, 2026, 16:08 UTC resolved
The issue affecting Claude Mythos 5 and Claude Fable 5 has been resolved.
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 Aug 13, 2026?
The Claude status page has not published a cause.
When was the Claude partial outage on Aug 13, 2026 fixed?
The Claude status page marked it resolved at Aug 13, 2026, 16:08 UTC, 1 hour 35 min after it started. Its resolution note: "The issue affecting Claude Mythos 5 and Claude Fable 5 has been resolved."
How long did the Claude partial outage last?
About 1 hour 35 min: from Aug 13, 2026, 14:33 UTC to Aug 13, 2026, 16:08 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.