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64.9%of 37 verified observed days had no reported provider issue
90-Day Trend
Dashed calendar markers below identify legacy observations whose source-at-observation was not recorded.
Monthly Status Summary
Month
Issue-free days
Days Tracked
Days with issues
September 2026
63.3%
30
11
This percentage summarizes normalized provider-status observations by calendar day. It is not duration-based, component-weighted, or contractual uptime. See the methodology and limitations.
Recorded Daily Status (Last 91 Days)
Jul 2Today
Legacy observation Operational Degraded Partial Outage Major Outage Maintenance No Data
Incident History
September 2026
Degraded performance on platform.claude.com and Claude for Microsoft Office 365
We are seeing success rates recover across affected services. Core inference and the API are not impacted.
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.
Degraded performance on Claude for Microsoft Office 365
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.
A mitigation has been applied for the issue affecting Claude Cowork and Claude Code on the web, and we are monitoring for recovery. Sessions that disconnected earlier can be retried
identified
We have identified an issue with an upstream cloud provider affecting Claude Cowork and Claude Code on the web. Some sessions may fail to start or disconnect mid-task; affected sessions can be retried. We are in contact with the provider and will provide an update as soon as possible.
Legacy Incident Archive
206 archived records restored. These records predate source-at-observation attestation. They are shown as historical ServiceAlert records only and do not establish a provider-reported incident, resolution, duration, or current active state.
June 2026
Elevated errors on Claude Sonnet 4.6 and Opus 4.8
minorSource not attested
Last archived state: resolved
View archived record details
identified
At this time, success rates for Claude Sonnet 4.6 have recovered and we are working to resolve an issue resulting in elevated errors on Opus 4.8. We will provide additional updates as soon as possible.
investigating
We are currently investigating this issue.
Elevated errors for Claude Opus 4.8
majorSource not attested
Last archived state: resolved
View archived record details
monitoring
We have resolved the issue resulting in elevated errors on requests to Claude Opus 4.8, and are currently monitoring closely to prevent any further issues.
investigating
We are investigating elevated errors on requests to Claude Opus 4.8. We will provide an update as soon as possible.
Opus 4.8 errors
Source not attested
Last archived state: resolved
View archived record details
monitoring
Opus 4.8 error rates were elevated from 12:41 PDT to approximately 12:53 PDT. The team is monitoring.
Elevated errors across many models
minorSource not attested
Last archived state: resolved
View archived record details
monitoring
A fix has been implemented and we are monitoring the results.
identified
We are continuing to work on a fix for this issue.
identified
We are continuing to work to resolve an elevated rate of errors on requests to Claude Opus 4.8, and will provide an additional update as soon as possible.
identified
We are still seeing errors on Opus 4.8 and Haiku 4.5.
monitoring
A fix has been implemented and we are monitoring the results.
investigating
We are currently investigating this issue.
Elevated errors on Claude Opus 4.8
minorSource not attested
Last archived state: resolved
View archived record details
monitoring
A fix has been implemented and we are monitoring the results.
investigating
We are currently investigating this issue.
Elevated errors on Claude Opus 4.8
minorSource not attested
Last archived state: resolved
View archived record details
investigating
We are currently investigating this issue.
We’ve suspended access to Claude Mythos 5 and Claude Fable 5
criticalSource not attested
Last archived state: resolved
View archived record details
monitoring
Learn more here: https://anthropic.com/news/fable-mythos-access
Elevated errors across models
majorSource not attested
Last archived state: resolved
View archived record details
monitoring
A fix has been implemented and we are monitoring the results.
investigating
We are currently investigating this issue.
Elevated errors on Claude Opus 4.6
minorSource not attested
Last archived state: resolved
View archived record details
monitoring
A fix has been implemented and we are monitoring the results.
identified
The issue has been identified and a fix is being implemented.
investigating
We are currently investigating this issue.
Elevated errors on Claude Haiku 4.5
minorSource not attested
Last archived state: resolved
View archived record details
monitoring
We are continuing to monitor Claude Haiku 4.5 towards full recovery, and at this point have seen success rates recover to close to normal operating levels. We are working to ensure there are no further issues.
monitoring
A fix has been implemented and we are monitoring the results.
identified
We are continuing to work on a fix for this issue.
identified
The issue has been identified and a fix is being implemented.
