System Card: Claude Fable 5 & Claude Mythos 5

System cardAnthropic9 Jun 2026r1

Cite

anthropic:claude-fable-5-mythos-5-system-card/r1/p1
https://safetypage.noahairmet.com/d/anthropic/claude-fable-5-mythos-5-system-card/r1/p1
@misc{anthropic2026,
  title = {System Card: Claude Fable 5 & Claude Mythos 5},
  author = {{Anthropic}},
  year = {2026},
  url = {https://www-cdn.anthropic.com/57a52ea7d8f0e54e8a542e908266086df425cdf5/Claude%20Fable%205%20%26%20Claude%20Mythos%205%20System%20Card.pdf}
}

Latest, r2

System Cardp. 1

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