Elevated errors for multiple models resolved

Anthropic experienced elevated errors on requests to multiple models, including Claude Fable 5 and Mythos 5. The incident was identified, mitigated, and is now in monitoring. Most models have recovered, but some residual issues remain.

Jul 16, 2026Views:0

Impact Assessment

Cost0

Reliability4

Migration0

Quality2

Compliance0

Elevated errors affected multiple models, with partial recovery. Some models (Claude Fable 5, Mythos 5) still experiencing issues. No cost or migration impact.

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;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 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;22:01&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;

Sources

status

Anthropic Status History

Elevated errors for multiple models | https://status.claude.com/incidents/kqbd7wm6hnnr | <p> <small>Jul <var data-var='date'>16</var>, <var data-var='time&...

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