Haiku 4.5 elevated errors incident resolved

An incident causing elevated errors on Haiku 4.5 was identified, updated, and resolved on July 21. The issue lasted from 07:11 to 08:53 UTC. No further action needed.

Jul 21, 2026Views:0

Impact Assessment

Cost0

Reliability3

Migration0

Quality0

Compliance0

Reliability impact during the incident window; now resolved.

Changes

Before

Elevated errors on Haiku 4.5 | https://status.claude.com/incidents/v35b71rthzhp | &lt;p&gt; &lt;small&gt;Jul &lt;var data-var=&apos;date&apos;&gt;21&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;07:11&lt;/var&gt; UTC&lt;/small&gt;&lt;br&gt; &lt;strong&gt;Identified&lt;/strong&gt; - The issue has been identified and a fix is being implemented. &lt;/p&gt;

After

Elevated errors on Haiku 4.5 | https://status.claude.com/incidents/v35b71rthzhp | &lt;p&gt; &lt;small&gt;Jul &lt;var data-var=&apos;date&apos;&gt;21&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;08:53&lt;/var&gt; UTC&lt;/small&gt;&lt;br&gt; &lt;strong&gt;Resolved&lt;/strong&gt; - This incident has been resolved. &lt;/p&gt; &lt;p&gt; &lt;small&gt;Jul &lt;var data-var=&apos;date&apos;&gt;21&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;08:19&lt;/var&gt; UTC&lt;/small&gt;&lt;br&gt; &lt;strong&gt;Update&lt;/strong&gt; - We are continuing to work on a fix for this issue. &lt;/p&gt; &lt;p&gt; &lt;small&gt;Jul &lt;var data-var=&apos;date&apos;&gt;21&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;07:11&lt;/var&gt; UTC&lt;/small&gt;&lt;br&gt; &lt;strong&gt;Identified&lt;/strong&gt; - The issue has been identified and a fix is being implemented. &lt;/p&gt;

Sources

status

Anthropic Status History

Elevated errors on Haiku 4.5 | https://status.claude.com/incidents/v35b71rthzhp | <p> <small>Jul <var data-var='date'>21</var>, <var data-var='time'&g...

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