Daily provider-status observations and published incident history for Anthropic (Claude).
Component incident
Anthropic (Claude) has an active component incident; no global outage is indicated. Verified .
Official provider source.
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60.2%of 83 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
October 2026
48.4%
31
16
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)
Aug 17Today
Legacy observation Operational Degraded Partial Outage Major Outage Maintenance No Data
Incident History
September 2026
Intermittent error spikes for Claude Mythos 5.1 and Claude Fable 5.1
claude.aiClaude API (api.anthropic.com)Claude CodeClaude Cowork
monitoring
A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery.
monitoring
A fix has been deployed for Claude Mythos 5.1 and Claude Fable 5.1 and we are monitoring for recovery.
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.
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.
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.
Degraded functionality for Claude Cowork on Windows
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.
claude.aiClaude API (api.anthropic.com)Claude CodeClaude Cowork
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.
identified
The only affected models right now are Opus 4.8 and Opus 5. The rest of the models have recovered to baseline error rate.
identified
We are continuing to work on a fix for this issue.
identified
An exhaustive list of affected models: Mythos/Fable 5.1, Mythos/Fable 5, Opus 5, Opus 4.8, Opus 4.6.
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.
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.
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.
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 elevated errors affecting Claude for Microsoft Office 365. We 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.
April 2026
Degraded Performance on Vaults
minorSource not attested
Last archived state: resolved
View archived record details
investigating
We are currently investigating this issue.
Elevated Connector Error Rates
minorSource not attested
Last archived state: resolved
View archived record details
investigating
Certain connectors are experiencing higher error rates. We are investigating the issue.
Sonnet 4.6 elevated rate of errors
minorSource not attested
Last archived state: resolved
View archived record details
identified
The issue has been identified and a fix is being implemented.
Outage affecting Workspace Creation
Source not attested
Last archived state: resolved
View archived record details
monitoring
A fix has been deployed for the issue affecting API workspace creation and we are monitoring for recovery.
investigating
We are investigating errors related to creating workspaces via the Claude Console at platform.claude.com and via the admin API
Other functionality including inference and the messages API is not impacted
Elevated errors on Claude.ai, API, Claude Code
minorSource not attested
Last archived state: resolved
View archived record details
investigating
We are currently investigating an issue with authentication across multiple product surfaces.
Sonnet 4.6 elevated rate of errors
majorSource 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 continuing to investigate this issue.
investigating
We are currently investigating this issue.
Elevated errors on Claude.ai
criticalSource not attested
Last archived state: resolved
View archived record details
monitoring
We have applied a fix and success rates have returned to normal. We are continuing to monitor closely to ensure there are no further issues.
identified
We have identified an issue resulting in elevated errors on Claude.ai, including desktop and mobile. Users may experience errors when attempting to login, engaging with voice mode, or completing chats with Claude. We are working to resolve this issue as soon as possible.
Sonnet 4.6 elevated rate of errors
minorSource not attested
Last archived state: resolved
View archived record details
investigating
We are currently investigating this issue.
Elevated errors on Claude.ai
majorSource not attested
Last archived state: resolved
View archived record details
monitoring
We have applied a fix, and are seeing success rates recover across affected services. We are continuing to monitor to ensure there is no recurrence of issues.
identified
We are continuing to work on a fix for this issue.
identified
This issue additionally affects login on other surfaces, such as Claude.code.
identified
We have identified an issue resulting in elevated errors on Claude.ai, including desktop and mobile. Users may experience errors when attempting to login, engaging with voice mode, or completing chats with Claude. We are working to resolve this issue as soon as possible.
Elevated errors on requests to Claude Sonnet 4.6
majorSource not attested
Last archived state: resolved
View archived record details
investigating
We are currently investigating an issue resulting in elevated errors on requests to Claude Sonnet 4.6. We will provide an update as soon as possible.
