System Card: Claude Fable 5 and Claude Mythos 5 [pdf]
![System Card: Claude Fable 5 and Claude Mythos 5 [pdf]](https://pub-90f0ac00d93c47daac3e1d2cdd28d496.r2.dev/articles/3eac5d4b7f78974ed7a61e225499ea79.webp)
www-cdn.anthropic.com
June 9, 2026
1 min read
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58/100
Summary
Claude Fable 5 and Claude Mythos 5 are AI models developed by Anthropic, designed to enhance user interaction and understanding. The System Card provides details on their capabilities, safety measures, and intended use cases.
![System Card: Claude Mythos Preview [pdf]](https://pub-90f0ac00d93c47daac3e1d2cdd28d496.r2.dev/articles/7b8a89e8454a0bcc169dd0040a75d6e6.webp)
