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.
August 2026
Degraded performance on Claude Sonnet 5
minorSource not attested
Last archived state: resolved
View archived record details
investigating
We are currently investigating this issue.
Error rates across multiple models
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.
July 2026
Degraded performance on Claude Sonnet 5
minorSource not attested
Last archived state: resolved
View archived record details
investigating
We are currently investigating this issue.
Degraded performance on Claude Opus 4.8
minorSource not attested
Last archived state: resolved
View archived record details
investigating
We are currently investigating this issue.
Elevated errors across many models
majorSource not attested
Last archived state: resolved
View archived record details
monitoring
We are also investigating issues with Opus 4.7 and Opus 4.5.
monitoring
As of 2:58 PT / 9:58 UTC the errors are back to baseline.
identified
As of 01:33 PT / 08:33 UTC we are back to errors across all models.
identified
As of 8:05 UTC / 1:05 PT, Sonnet 5 errors are back to baseline, but we're seeing an increased error rate on Fable 5.
identified
As of 7:32 UTC / 0:32 PT, Opus 5 errors are back to baseline but we're seeing again Sonnet 5's errors up.
identified
All models except Opus 5 have recovered. We're working to recover Opus 5 as well.
investigating
We are currently investigating this issue.
Elevated errors across all models
criticalSource not attested
Last archived state: resolved
View archived record details
monitoring
From 12:45 PT / 19:45 UTC through to 1:26 PT / 21:26 UTC, we saw elevated rates of errors across Claude models. We have seen recovery in success rates across all models and are monitoring closely to ensure no further issues.
identified
We are continuing to work to fully resolve issues resulting in elevated requests and latency to Claude models. At this time, we are seeing recovery across most models. We will provide an additional update as soon as possible.
identified
We have identified an issue resulting in elevated errors across multiple models, and are working to resolve this. We will provide an update as soon as possible.
investigating
We are currently investigating this issue.
Elevated errors on Claude Opus 5 and Haiku 4.5
minorSource not attested
Last archived state: resolved
View archived record details
investigating
Haiku 4.5 is also returning errors.
investigating
We are currently investigating this issue.
investigating
We are continuing to investigate this issue.
investigating
We are currently investigating this issue.
Elevated errors on Claude Opus 5
minorSource not attested
Last archived state: resolved
View archived record details
investigating
We are currently investigating this issue.
Elevated errors on Claude Opus 5
minorSource not attested
Last archived state: resolved
View archived record details
investigating
We are currently investigating this issue.
Elevated errors for Opus 5
majorSource 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.
