Claude Outage History By Surface
Most reviewed Claude incidents in this archive are narrower than a full sitewide outage. This page breaks the history down by the part of Claude that actually failed.
Published: Apr 21, 2026, 6:45 AM EDT
Updated: Apr 21, 2026, 8:40 AM EDT
Reviewed notes
24
Manual incident notes used in this breakdown
Surface-specific share
83%
Notes that were narrower than a broad platform outage
Longest reviewed event
6h
Usage and analytics admin API endpoints degraded on April 14, 2026
Most common lane
Model/API
11 reviewed incidents so far
Only 4 of the 24 reviewed notes so far look like broad Claude platform outages. The rest were narrower failures tied to login, model reliability, uploads, connectors, or desktop-specific behavior.
That split matters. A person searching for “is Claude down” may really be hitting a login issue, a model error spike, or a broken upload path. Collapsing those into one undifferentiated outage chart hides the useful part.
Surface breakdown
Broad Claude outages
Share of archive
17%
Cross-surface failures where Claude felt broadly down rather than broken in one narrow feature.
Reviewed notes
4
Tracked time
6.3h
Avg duration
1h 34m
Major notes
2
Latest reviewed note: Claude.ai, API, and Claude Code all saw elevated errors on April 15, 2026 on Apr 15, 2026. Browse the filtered archive view for this surface.
- Claude.ai, API, and Claude Code all saw elevated errors on April 15, 2026 (Apr 15, 2026)
- Some users hit errors connecting to Claude.ai on April 8, 2026 (Apr 8, 2026)
- Claude.ai saw elevated errors on April 7, 2026 (Apr 7, 2026)
Archive: Open only broad outages notes.
Next step: Check broader Claude outage symptoms.
Surface breakdown
Login and access failures
Share of archive
13%
Sign-in and direct-access problems where Claude could feel down even if core inference remained available.
Reviewed notes
3
Tracked time
2h
Avg duration
39m
Major notes
2
Latest reviewed note: Claude.ai and Claude Code login errors spiked on April 13, 2026 on Apr 13, 2026. Browse the filtered archive view for this surface.
- Claude.ai and Claude Code login errors spiked on April 13, 2026 (Apr 13, 2026)
- Claude email login broke on April 10, 2026 (Apr 10, 2026)
- Claude authentication failed across several surfaces on April 8, 2026 (Apr 8, 2026)
Archive: Open only login/access notes.
Next step: Check login-specific failures.
Surface breakdown
Model and API instability
Share of archive
46%
Model-specific or API-layer incidents that matter most to developers and power users.
Reviewed notes
11
Tracked time
15.7h
Avg duration
1h 25m
Major notes
2
Latest reviewed note: Claude Sonnet 4.5 saw an error spike on April 20, 2026 on Apr 20, 2026. Browse the filtered archive view for this surface.
- Claude Sonnet 4.5 saw an error spike on April 20, 2026 (Apr 20, 2026)
- Opus 4.6 had elevated errors on April 19, 2026 (Apr 19, 2026)
- Opus 4.6 saw elevated errors on April 16, 2026 (Apr 16, 2026)
Archive: Open only model/api notes.
Next step: Check API and model issues.
Surface breakdown
Uploads and integrations
Share of archive
21%
Upload-path and connector failures where Claude stays mostly reachable but a high-friction workflow breaks.
Reviewed notes
5
Tracked time
2.8h
Avg duration
34m
Major notes
0
Latest reviewed note: Claude file uploads failed for many users on April 20, 2026 on Apr 20, 2026. Browse the filtered archive view for this surface.
- Claude file uploads failed for many users on April 20, 2026 (Apr 20, 2026)
- Google Drive uploads into Claude.ai failed on April 17, 2026 (Apr 17, 2026)
- Adding credentials to Vaults failed on April 16, 2026 (Apr 16, 2026)
Archive: Open only uploads/integrations notes.
Next step: Check upload and connector issues.
Surface breakdown
Desktop and Cowork issues
Share of archive
4%
Desktop-specific incidents that do not necessarily imply a claude.ai or API-wide outage.
Reviewed notes
1
Tracked time
2.1h
Avg duration
2h 4m
Major notes
0
Latest reviewed note: Claude Cowork failed to start for some users on April 16, 2026 on Apr 16, 2026. Browse the filtered archive view for this surface.
Archive: Open only desktop/cowork notes.
Next step: Compare with desktop and Claude Code issues.
Use this breakdown together with the full outage archive, the methodology page, and the crowd-vs-official explainer. The homepage remains the live detector; this page is the slower historical layer.