Claude (Anthropic) · 57d ago
Elevated errors for Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5
ResolvedYes — Claude had a problem on August 13, 2026, and Claude (Anthropic) has since marked it resolved. Claude (Anthropic)'s latest word: “The issue affecting Claude Mythos 5 and Claude Fable 5 has been resolved.”
Timeline
Started: 8/13/2026, 2:33:45 PM
Last update: 8/14/2026, 10:28:21 AM
Resolved: 8/13/2026, 4:08:35 PM
Affected: rwppv331jlwc, k8w3r06qmzrp, yyzkbfz2thpt, bpp5gb3hpjcl
Updates
resolved
The issue affecting Claude Mythos 5 and Claude Fable 5 has been resolved.
8/13/2026, 4:08:35 PM
investigating
We are investigating elevated errors on requests to Claude Mythos 5 and Claude Fable 5. We will provide an update as soon as possible.
8/13/2026, 3:44:45 PM
investigating
We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5. We will provide an update as soon as possible.
8/13/2026, 2:33:45 PM
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