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Anthropic identifies degraded performance on Claude Mythos 5, Fable 5, Opus 5 — ModelPriceLab

Changes/Anthropic identifies degraded performance on Claude Mythos 5, Fable 5, Opus 5

ModerateAnthropicIncidentclaude-app

Anthropic identifies degraded performance on Claude Mythos 5, Fable 5, Opus 5

Anthropic has identified the cause of elevated errors on Claude Mythos 5, Fable 5, and Opus 5 and is working on a fix. A previous incident on Haiku 4.5 has been resolved. Users may experience degraded performance on these models.

Aug 5, 2026Views:0

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Degraded performance for Claude Mythos 5, Claude Fable 5, and Claude Opus 5 | https://status.claude.com/incidents/f6gkkq6txl7z | <p> <small>Aug <var data-var='date'> 5&l...

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