Outage in Anthropic
Elevated errors on Claude Opus 5 and Haiku 4.5
Resolved MinorIncident Report
Summary AI Generated
Anthropic experienced elevated errors affecting Claude Opus 5 and Haiku 4.5 across both claude.ai and the API for approximately 59 minutes on July 27, 2026. The issue expanded during the incident to include Haiku 4.5 in addition to Opus 5. Errors returned to baseline levels by 14:34 UTC, resolving the incident.
We are currently investigating this issue.
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Latest Updates ( sorted recent to last )
RESOLVED
5 days ago - at 07/27/2026 02:36PM
As of 7:34 PST / 14:34 UTC the errors have returned to baseline.
INVESTIGATING
5 days ago - at 07/27/2026 02:04PM
Haiku 4.5 is also returning errors.
INVESTIGATING
5 days ago - at 07/27/2026 01:42PM
We are currently investigating this issue.
INVESTIGATING
5 days ago - at 07/27/2026 01:41PM
We are continuing to investigate this issue.
INVESTIGATING
5 days ago - at 07/27/2026 01:39PM
We are currently investigating this issue.
Latest Anthropic outages
Degraded performance on Claude Sonnet 5 - 1 day ago
Degraded performance on Claude Opus 4.8 - 1 day ago
Elevated errors across many models - 2 days ago
Elevated errors across all models - 2 days ago
Elevated errors on Claude Opus 5 - 5 days ago
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