Elevated errors on Claude Opus 5 and Haiku 4.5

An ongoing incident is causing elevated errors on Claude Opus 5 and Haiku 4.5. The issue is under investigation, with updates indicating Haiku 4.5 is also affected. A previous service disruption on Claude Services has been resolved.

Jul 27, 2026Views:0

Impact Assessment

Cost0

Reliability4

Migration0

Quality3

Compliance0

Ongoing elevated errors on two models (Opus 5 and Haiku 4.5) directly impact reliability and output quality for users of those models. No cost, migration, or compliance impact identified.

Changes

Before

Service disruption on Claude Services | https://status.claude.com/incidents/ng5shnqxj1r7 | &lt;p&gt; &lt;small&gt;Jul &lt;var data-var=&apos;date&apos;&gt;22&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;17:45&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;22&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;17:28&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;22&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;17:27&lt;/var&gt; UTC&lt;/small&gt;&lt;br&gt; &lt;strong&gt;Investigating&lt;/strong&gt; - We are investigating an outage affecting features such as document creation in claude.ai, Cowork Remote, Claude Code, Claude Code on the Web, Claude Tag, and Claude Design &lt;/p&gt;

After

Elevated errors on Claude Opus 5 and Haiku 4.5 | https://status.claude.com/incidents/rkk5x44tndw9 | &lt;p&gt; &lt;small&gt;Jul &lt;var data-var=&apos;date&apos;&gt;27&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;14:04&lt;/var&gt; UTC&lt;/small&gt;&lt;br&gt; &lt;strong&gt;Update&lt;/strong&gt; - Haiku 4.5 is also returning errors. &lt;/p&gt; &lt;p&gt; &lt;small&gt;Jul &lt;var data-var=&apos;date&apos;&gt;27&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;13:42&lt;/var&gt; UTC&lt;/small&gt;&lt;br&gt; &lt;strong&gt;Update&lt;/strong&gt; - We are currently investigating this issue. &lt;/p&gt; &lt;p&gt; &lt;small&gt;Jul &lt;var data-var=&apos;date&apos;&gt;27&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;13:41&lt;/var&gt; UTC&lt;/small&gt;&lt;br&gt; &lt;strong&gt;Update&lt;/strong&gt; - We are continuing to investigate this issue. &lt;/p&gt; &lt;p&gt; &lt;small&gt;Jul &lt;var data-var=&apos;date&apos;&gt;27&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;13:39&lt;/var&gt; UTC&lt;/small&gt;&lt;br&gt; &lt;strong&gt;Investigating&lt;/strong&gt; - We are currently investigating this issue. &lt;/p&gt;

Sources

status

Anthropic Status History

Elevated errors on Claude Opus 5 and Haiku 4.5 | https://status.claude.com/incidents/rkk5x44tndw9 | <p> <small>Jul <var data-var='date'>27</var>, <var data-var=...

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