Outage in Anthropic
Elevated errors on Claude Sonnet 4.5
Resolved MinorIncident Report
Summary AI Generated
Anthropic experienced elevated errors on Claude Sonnet 4.5 affecting the api.anthropic.com service for 23 minutes. The errors occurred between 6:22-6:39 PT (13:22-13:39 UTC) on April 28, 2026. The incident was resolved after investigation and monitoring confirmed the service returned to normal operation.
We are currently investigating this issue.
Components affected
Anthropic api.anthropic.comTrusted by 1,000+ teams
Never miss outages in third-party dependencies
Stop finding out about outages from your users. Monitor 6,320+ cloud services and get alerted the second something breaks.
Latest Updates ( sorted recent to last )
RESOLVED
1 day ago - at 04/28/2026 01:50PM
The incident has now been resolved. The timeline for the elevated errors was 6:22 PT / 13:22 UTC -> 6:39 PT / 13:39 UTC.
INVESTIGATING
1 day ago - at 04/28/2026 01:29PM
We are currently investigating this issue.
Latest Anthropic outages
Elevated errors on Claude Haiku 4.5 - about 7 hours ago
Elevated errors on Claude Opus 4.7 - about 22 hours ago
Elevated errors on Claude Haiku 4.5 - 1 day ago
Elevated billing related errors on Claude.ai - 2 days ago
Never miss outages in third-party dependencies
With IsDown, you can monitor all your critical services' official status pages from one centralized dashboard and receive instant alerts the moment an outage is detected. Say goodbye to constantly checking multiple sites for updates and stay ahead of outages with IsDown.
Start free trialNo credit card required · Cancel anytime · 6320 services available
Integrations with
