Claude Haiku 4.5 elevated errors incident resolved

An incident causing elevated errors for Claude Haiku 4.5 (and other models) was identified and resolved on July 25. The issue lasted about an hour, from investigation to resolution.

Jul 25, 2026Views:0

Impact Assessment

Cost0

Reliability3

Migration0

Quality0

Compliance0

Elevated errors affected requests to Claude Haiku 4.5 and other models for approximately 1 hour. Incident is now resolved.

Changes

Before

Elevated errors for Mythos 5, Fable 5, Opus 5 and Claude Haiku 4.5 | https://status.claude.com/incidents/f1q2wvw4qj4j | &lt;p&gt; &lt;small&gt;Jul &lt;var data-var=&apos;date&apos;&gt;25&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;18:44&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; &lt;p&gt; &lt;small&gt;Jul &lt;var data-var=&apos;date&apos;&gt;25&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;18:40&lt;/var&gt; UTC&lt;/small&gt;&lt;br&gt; &lt;strong&gt;Investigating&lt;/strong&gt; - We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, and Claude Haiku 4.5. We will provide an update as soon as possible. &lt;/p&gt;

After

Elevated errors for Mythos 5, Fable 5, Opus 5 and Claude Haiku 4.5 | https://status.claude.com/incidents/f1q2wvw4qj4j | &lt;p&gt; &lt;small&gt;Jul &lt;var data-var=&apos;date&apos;&gt;25&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;19:44&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;25&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;18:44&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; &lt;p&gt; &lt;small&gt;Jul &lt;var data-var=&apos;date&apos;&gt;25&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;18:40&lt;/var&gt; UTC&lt;/small&gt;&lt;br&gt; &lt;strong&gt;Investigating&lt;/strong&gt; - We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, and Claude Haiku 4.5. We will provide an update as soon as possible. &lt;/p&gt;

Sources

status

Anthropic Status History

Elevated errors for Mythos 5, Fable 5, Opus 5 and Claude Haiku 4.5 | https://status.claude.com/incidents/f1q2wvw4qj4j | <p> <small>Jul <var data-var='date'>25</var&gt...

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