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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.
July 2026
Elevated errors for Claude Fable 5, Claude Sonnet 5, Claude Haiku 4.5, and other models
majorSource not attested
Last archived state: resolved
View archived record details
investigating
We are investigating elevated errors on requests to Claude Fable 5, Claude Sonnet 5, Claude Haiku 4.5, and other Claude models. We will provide an update as soon as possible.
Elevated errors for Mythos 5, Fable 5, Opus 5 and Claude Haiku 4.5
majorSource not attested
Last archived state: resolved
View archived record details
identified
The issue has been identified and a fix is being implemented.
investigating
We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, and Claude Haiku 4.5. We will provide an update as soon as possible.
Elevated error rate on 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 Haiku 4.5
minorSource not attested
Last archived state: resolved
View archived record details
investigating
We are currently investigating this issue.
Microsoft Office add-in availability
Source not attested
Last archived state: resolved
View archived record details
identified
Users who installed the following add-ins may experience issues accessing the add-in functionality: Claude by Anthropic for PowerPoint, Claude by Anthropic for Word, and Claude by Anthropic for Excel.
To regain immediate access to Claude for Microsoft 365, install the add-in here: https://marketplace.microsoft.com/en-us/product/office/wa200010725
Service disruption on Claude Services
minorSource not attested
Last archived state: resolved
View archived record details
identified
The issue has been identified and a fix is being implemented.
investigating
We are investigating an outage affecting features such as document creation in claude.ai, Cowork Remote, Claude Code, Claude Code on the Web, Claude Tag, and Claude Design
Elevated error rates for Sonnet 5
minorSource not attested
Last archived state: resolved
View archived record details
identified
The issue has been identified and a fix is being implemented.
investigating
We are currently investigating this issue.
Elevated errors on Opus 4.8 and Haiku 4.5
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. Haiku 4.5 has recovered
identified
The issue has been identified and a fix is being implemented.
investigating
We are currently investigating this issue.
Elevated errors for Claude Opus 4.1
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.
Service disruption on Claude services
criticalSource 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 on a fix for this issue.
identified
We are continuing to work on a fix for this issue.
identified
We are investigating an outage affecting features such as document creation in claude.ai, Cowork Remote, Claude Code, Claude Code on the Web, Claude Tag, and Claude Design
