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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.
May 2026
Elevated errors on Claude Opus 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.
identified
The issue has been identified and a fix is being implemented.
investigating
We are continuing to investigate this issue.
investigating
We are currently investigating this issue.
April 2026
Elevated errors on Claude Haiku 4.5
minorSource not attested
Last archived state: resolved
View archived record details
investigating
We are currently investigating this issue.
claude.ai and API unavailable
criticalSource 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 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.
investigating
We are currently investigating this issue.
Elevated errors on Claude Opus 4.7
minorSource not attested
Last archived state: resolved
View archived record details
investigating
We are currently investigating this issue.
Claude.ai unavailable and elevated errors on the API
majorSource not attested
Last archived state: resolved
View archived record details
monitoring
We are seeing success rates across all services return to normal, and are monitoring closely to prevent any further issues. Impact occurred from 17:34–18:52 UTC.
identified
We are continuing to work to resolve the issues preventing users from accessing Claude.ai, and causing elevated authentication errors for requests to the API and Claude Code.
identified
We have identified an issue resulting in elevated errors on the Anthropic API, as well as issues accessing Claude.ai, including log-in paths for Claude Code. We are working to resolve these issues, and will provide an update as soon as possible.
investigating
We are investigating an issue preventing users from reaching Claude.ai, and will provide an update as soon as possible.
Elevated errors on Claude Sonnet 4.5
minorSource not attested
Last archived state: resolved
View archived record details
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
A fix has been implemented and we are monitoring the results.
investigating
We are currently investigating this issue.
Elevated billing related errors on Claude.ai
Source not attested
Last archived state: resolved
View archived record details
investigating
We are currently investigating this issue.
Investigated elevated errors and slower responses on claude.ai
