[retroactive] Elevated errors on Claude Haiku 3.5 and Claude Haiku 3

1 min read

Sep 20, 10:41 UTC
Resolved – This incident has been resolved.

Sep 20, 10:37 UTC
Investigating – From Sep 19 19:00 PT (Sep 20 02:00 UTC) until Sep 19 22:00 PT (Sep 20 05:00 UTC) the Claude Haiku 3 model experienced a very high error rate.

From Sep 19 19:30 PT (Sep 20 02:30 UTC) until Sep 19 20:30 PT (Sep 20 03:00 UTC) the Claude Haiku 3.5 model experienced a very high error rate.

This is a retroactive incident.

via Claude Status – Incident History https://status.anthropic.com/incidents/f3p8ct8rb146
September 20, 2025 at 11:41AM

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