Outage in Anthropic

Elevated errors on Claude 4 Sonnet

Resolved Major
July 21, 2025 - Started 1 day ago - Lasted about 2 hours
Official incident page

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Outage Details

We are currently investigating an issue with Claude 4 Sonnet that started at 6:15 UTC.
Latest Updates ( sorted recent to last )
RESOLVED 1 day ago - at 07/21/2025 08:57AM

As of 08:52 UTC we have full recovery for the Claude 4 Sonnet model

MONITORING 1 day ago - at 07/21/2025 08:44AM

A fix has been implemented and we are monitoring the results.

IDENTIFIED 1 day ago - at 07/21/2025 08:13AM

The issue has been identified and a fix is being implemented.

INVESTIGATING 1 day ago - at 07/21/2025 07:23AM

We are continuing to investigate this issue.

INVESTIGATING 1 day ago - at 07/21/2025 07:12AM

We are currently investigating an issue with Claude 4 Sonnet that started at 6:15 UTC.

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