Anthropic investigates elevated errors across Claude Mythos 5.1, Fable 5.1 and Opus 5
ClaudeAI-mod-bot · reddit · 2026-09-22
Anthropic's status page reports elevated error rates for requests to Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5, with investigation starting Sep 22, 00:57 UTC. A dedicated discussion hub on r/ClaudeAI mirrors the live incident updates.
Related event: Anthropic Suffers Major Outage Across Claude Models(2 posts)→
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