New incident: Elevated errors for Claude Haiku 4.5 and Opus 4.8

Anthropic is investigating elevated errors affecting Claude Haiku 4.5 and Opus 4.8 as of July 21. A previous incident for multiple models (July 16) has been resolved and removed from the status feed.

Jul 21, 2026Views:0

Impact Assessment

Cost0

Reliability3

Migration0

Quality0

Compliance0

Reliability impact due to elevated errors; no cost, migration, quality, or compliance impact identified.

Changes

Before

Elevated errors for multiple models | https://status.claude.com/incidents/kqbd7wm6hnnr | &lt;p&gt; &lt;small&gt;Jul &lt;var data-var=&apos;date&apos;&gt;16&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;22:53&lt;/var&gt; UTC&lt;/small&gt;&lt;br&gt; &lt;strong&gt;Resolved&lt;/strong&gt; - This issue has been resolved. From 11:30am PT / 18:30 UTC through to 3:15pm PT / 22:15 UTC some users experienced elevated errors on requests to Claude Models. Most errors were experienced within the first hour of the impact window. &lt;/p&gt; &lt;p&gt; &lt;small&gt;Jul &lt;var data-var=&apos;date&apos;&gt;16&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;22:01&lt;/var&gt; UTC&lt;/small&gt;&lt;br&gt; &lt;strong&gt;Monitoring&lt;/strong&gt; - We have seen success rates recover and are continuing to monitor closely to ensure no further issues. We will provide an additional update shortly. &lt;/p&gt; &lt;p&gt; &lt;small&gt;Jul &lt;var data-var=&apos;date&apos;&gt;16&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;20:58&lt;/var&gt; UTC&lt;/small&gt;&lt;br&gt; &lt;strong&gt;Update&lt;/strong&gt; - At this time, we are seeing recovery on requests to most models. We are continuing to see elevated errors on requests to Claude Fable 5 and Mythos 5, and are working to resolve these remaining issues. We will provide an additional update as soon as possible. &lt;/p&gt; &lt;p&gt; &lt;small&gt;Jul &lt;var data-var=&apos;date&apos;&gt;16&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;20:07&lt;/var&gt; UTC&lt;/small&gt;&lt;br&gt; &lt;strong&gt;Update&lt;/strong&gt; - We are continuing to work to resolve issues resulting in elevated errors on requests to some Anthropic models. We will provide additional updates as soon as possible. &lt;/p&gt; &lt;p&gt; &lt;small&gt;Jul &lt;var data-var=&apos;date&apos;&gt;16&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;19:14&lt;/var&gt; UTC&lt;/small&gt;&lt;br&gt; &lt;strong&gt;Identified&lt;/strong&gt; - We have identified the cause of elevated errors on requests to multiple models, and are working to resolve this issue. We will provide an update as soon as possible. &lt;/p&gt; &lt;p&gt; &lt;small&gt;Jul &lt;var data-var=&apos;date&apos;&gt;16&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;18:36&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 multiple models. We will provide an update as soon as possible. &lt;/p&gt;

After

Elevated errors across models | https://status.claude.com/incidents/y65gwqbztbsp | &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;10:11&lt;/var&gt; UTC&lt;/small&gt;&lt;br&gt; &lt;strong&gt;Investigating&lt;/strong&gt; - We are currently investigating issues with Claude Haiku 4.5 and Opus 4.8. &lt;/p&gt;

Sources

status

Anthropic Status History

Elevated errors across models | https://status.claude.com/incidents/y65gwqbztbsp | <p> <small>Jul <var data-var='date'>21</var>, <var data-var='time'&...

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