Claude Opus 4.8 incident resolved; new incident for Fable 5 and Mythos 5 — ModelPriceLab

Changes/Claude Opus 4.8 incident resolved; new incident for Fable 5 and Mythos 5

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Claude Opus 4.8 incident resolved; new incident for Fable 5 and Mythos 5

A resolved incident for Claude Opus 4.8 (June 23) was removed from the status history, and a new incident for Claude Fable 5 and Claude Mythos 5 was added (July 3), now marked as resolved after a brief period of elevated errors.

Jul 3, 2026Views:0

Impact Assessment

Cost0

Reliability2

Migration0

Quality0

Compliance0

The new incident was short-lived (about 12 minutes) and has been resolved. No ongoing impact.

Changes

Before

Elevated errors for Claude Opus 4.8 | https://status.claude.com/incidents/2stpj60m2fr9 | &lt;p&gt; &lt;small&gt;Jun &lt;var data-var=&apos;date&apos;&gt;23&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;08:45&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;Jun &lt;var data-var=&apos;date&apos;&gt;23&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;07:47&lt;/var&gt; UTC&lt;/small&gt;&lt;br&gt; &lt;strong&gt;Monitoring&lt;/strong&gt; - A fix has been implemented and we are monitoring the results. &lt;/p&gt; &lt;p&gt; &lt;small&gt;Jun &lt;var data-var=&apos;date&apos;&gt;23&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;06:28&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;

After

Elevated errors on Claude Fable 5 and Claude Mythos 5 | https://status.claude.com/incidents/mphfs246cjg1 | &lt;p&gt; &lt;small&gt;Jul &lt;var data-var=&apos;date&apos;&gt; 3&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;22:06&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; 3&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;22:00&lt;/var&gt; UTC&lt;/small&gt;&lt;br&gt; &lt;strong&gt;Monitoring&lt;/strong&gt; - A fix has been implemented and we are monitoring the results. &lt;/p&gt; &lt;p&gt; &lt;small&gt;Jul &lt;var data-var=&apos;date&apos;&gt; 3&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;21:55&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; 3&lt;/var&gt;, &lt;var data-var=&apos;time&apos;&gt;21:54&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 Fable 5 and Claude Mythos 5 | https://status.claude.com/incidents/mphfs246cjg1 | <p> <small>Jul <var data-var='date'> 3</var>, <var da...

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