Outage in Anthropic
Elevated errors across many models
Resolved Major
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Outage Details
We are investigating an issue across many models that started at 12:35 PT / 19:35 UTC.
Latest Updates ( sorted recent to last )
RESOLVED
3 days ago - at 09/18/2025 08:55PM
This incident has been resolved.
MONITORING
3 days ago - at 09/18/2025 08:41PM
As of 13:40 PT / 20:40 UTC all the models are at the baseline error rate.
IDENTIFIED
4 days ago - at 09/18/2025 08:32PM
As of 13:30 PT / 20:30 UTC all the models have returned to the baseline error rate except for Claude Sonnet 3.5 where it is still high.
All the models have been affected by this incident, except for Sonnet 4.0.
INVESTIGATING
4 days ago - at 09/18/2025 07:57PM
We are investigating an issue across many models that started at 12:35 PT / 19:35 UTC.
Latest Anthropic outages
Elevated error rates on API and claude.ai - about 1 hour ago
Elevated errors on Claude 4 Sonnet - 6 days ago
Problems loading Claude.ai Artifacts - 6 days ago
Elevated errors on Claude Opus 4.1 - 7 days ago
Elevated errors on Claude Haiku 3.5 - 7 days ago
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