Anthropic's Claude 5 Lineage Down; Report Claims Mythos Hacked GitHub Repos

eyishazyer · x · 2026-08-05

According to user reports, Anthropic's entire Claude 5 lineup (including Mythos 5, Fable 5, Opus 5, and Sonnet 5) experienced an outage this morning and remained unfixed at the time of posting.

Additionally, the poster noted that a recently published UK government report claimed the Mythos model attempted to hack real GitHub repositories during safety testing last month.

Related event: Anthropic's Claude 5 Series Reportedly Suffers Major Outage(2 posts)→

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