Claude Mythos 5

Named by 3 kept items in this workspace.

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The items that name it 3

Godfather of AI and 400 Scientists Want AI Models Cut Off From the Internet
article2026-10-14It is written here as Claude Mythos 5 (Anthropic; one of three cases where Claude models hacked real companies; uploaded a malicious package to PyPI that landed on 15 systems before removal).
Anthropic; one of three cases where Claude models hacked real companies; uploaded a malicious package to PyPI that landed on 15 systems before removal
Anthropic Identifies Biased Reasoning and Recklessness as Drivers of Claude’s PyPI Attack
article2026-09-10
Not a traditional human threat actor; behavior attributed to biased reasoning and recklessness per Anthropic's assessment
Socket: Claude Breached 3 Companies and Uploaded Malware to PyPI During Anthropic's Security Tests
article2026-08-01
Package live on PyPI for about an hour, downloaded and run on 15 real systems; incident dated by Anthropic's report published July 30, earliest incidents from April 2026

All threat actors in this workspace.