Degraded functionality for Claude Cowork on Windows
Identified - A Windows update released September 8 has left Claude Cowork on Windows unable to run local commands, because its workspace can no longer reach your computer's drive. For most users, chat and file reading and editing still work. There's no in-app workaround yet, and restarting or reinstalling won't help. Microsoft has developed a fix and is working to release it. We'll post an update when we have more to share.
Sep 10, 2026 - 15:54 UTC
Uptime over the past 90 days. View historical uptime.
claude.ai Operational
Claude Console (platform.claude.com) Operational
Claude API (api.anthropic.com) Operational
Claude Code Operational
Claude Cowork Partial Outage
Claude for Government Operational
Operational
Degraded Performance
Partial Outage
Major Outage
Maintenance
Major outage
Partial outage
No downtime recorded on this day.
No data exists for this day.
had a major outage.
had a partial outage.

No incidents or maintenance related to this downtime.

Sep 12, 2026

No incidents reported today.

Sep 11, 2026

Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1
Resolved - The issue affecting Claude services has been resolved. Impact occurred from 13:57 to 14:20 UTC
Sep 11, 14:37 UTC
Update - A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery.
Sep 11, 14:28 UTC
Monitoring - A fix has been deployed for Claude Mythos 5.1 and Claude Fable 5.1 and we are monitoring for recovery.
Sep 11, 14:28 UTC
Identified - We have identified the cause of elevated errors on requests to Claude Mythos 5.1 and Claude Fable 5.1 and are working on a fix. We will provide an update as soon as possible.
Sep 11, 14:21 UTC
Investigating - We are investigating elevated errors on requests to Claude Fable 5.1 and Claude Mythos 5.1. We will provide an update as soon as possible.
Sep 11, 14:19 UTC

Sep 10, 2026

Elevated latency on the Claude API for some users
Resolved - The issue affecting Claude services has been mitigated.
Sep 10, 23:24 UTC
Identified - We are experiencing slower than normal response times on the Claude API for some customers whose traffic enters through the US Midwest. Users may experience elevated latency and some request timeouts.
Sep 10, 21:43 UTC

Sep 9, 2026

No incidents reported.

Sep 8, 2026

No incidents reported.

Sep 7, 2026

No incidents reported.

Sep 6, 2026

No incidents reported.

Sep 5, 2026

No incidents reported.

Sep 4, 2026

No incidents reported.

Sep 3, 2026

Elevated errors for multiple models
Resolved - The issue affecting Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5 has been resolved. Impact has ended as of 9:16 PT / 16:16 UTC.
Sep 3, 16:23 UTC
Monitoring - A fix has been deployed for Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5 and we are monitoring for recovery.
Sep 3, 16:06 UTC
Update - The only affected models right now are Opus 4.8 and Opus 5. The rest of the models have recovered to baseline error rate.
Sep 3, 15:25 UTC
Update - We are continuing to work on a fix for this issue.
Sep 3, 14:49 UTC
Update - An exhaustive list of affected models: Mythos/Fable 5.1, Mythos/Fable 5, Opus 5, Opus 4.8, Opus 4.6.
Sep 3, 13:50 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 3, 13:41 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 3, 13:26 UTC
Elevated errors for Claude Sonnet 5
Resolved - This incident has been resolved.
Sep 3, 12:56 UTC
Monitoring - A fix has been implemented and we are monitoring the results.
Sep 3, 12:47 UTC
Investigating - We are investigating elevated errors on requests to Claude Sonnet 5. We will provide an update as soon as possible.
Sep 3, 12:37 UTC

Sep 2, 2026

Elevated errors for Claude Sonnet 5
Resolved - The issue affecting Claude Sonnet 5 has been resolved. Impact occurred from 2:05pm PT / 21:05 UTC to 2:19pm PT / 21:19 UTC.
Sep 2, 21:44 UTC
Investigating - We are investigating elevated errors on requests to Claude Sonnet 5. We will provide an update as soon as possible.
Sep 2, 21:17 UTC
Delays in credit purchases
Resolved - This issue has been resolved.
Sep 2, 01:24 UTC
Monitoring - We have identified and resolved an issue where users who reached a balance of zero usage credits saw delays in the availability of newly purchased credits, resulting in some requests to the Claude API receiving 'credit balance is too low' errors erroneously. This affected credits purchased from 05:10am PT / 12:10 UTC to 2:35pm PT / 21:35 UTC. At this time, newly purchased credits should be available as expected and we are working to resolve any remaining impact.
Sep 1, 23:26 UTC

Sep 1, 2026

Degraded performance on platform.claude.com and Claude for Microsoft Office 365
Resolved - This issue has been resolved.
Sep 1, 18:07 UTC
Monitoring - We are seeing success rates recover across affected services. Core inference and the API are not impacted.
Sep 1, 17:52 UTC
Investigating - We are investigating reports of degraded performance affecting some Claude services, including docs.claude.com. We are working to resolve these issues and will provide an update as soon as possible.
Sep 1, 17:05 UTC
Degraded performance on Claude for Microsoft Office 365
Resolved - This issue has been resolved.
Sep 1, 16:22 UTC
Investigating - We are investigating elevated errors affecting Claude for Microsoft Office 365. We will provide an update as soon as possible.
Sep 1, 16:02 UTC

Aug 31, 2026

Degraded performance on claude.ai and Claude Code
Resolved - The issue affecting Claude Code has been resolved. Impact occurred from 16∶55 to 19∶16 UTC.
Aug 31, 20:36 UTC
Investigating - We are investigating reports of degraded performance affecting Claude in Slack, Claude Code on the web, and Code Review. We will provide an update as soon as possible.
Aug 31, 19:21 UTC
Degraded performance on claude.ai
Resolved - This issue has been resolved.
Aug 31, 17:52 UTC
Monitoring - We have seen success rates return to normal for requests on Claude.ai and are monitoring closely.
Aug 31, 17:32 UTC
Investigating - We are investigating reports of elevated errors affecting chats on claude.ai. We will provide an update as soon as possible.
Aug 31, 17:23 UTC

Aug 30, 2026

No incidents reported.

Aug 29, 2026

No incidents reported.

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