Claude Fable 5.1 reportedly cracks a 373-year-old unsolved cipher
RusselTheBrickLayer · reddit · 2026-09-02
Eval firm Vals AI claims Anthropic's Fable 5.1 solved a centuries-old cipher that no one else could crack. Full details and verification are in their X thread and blog post.
Related event: Fable 5.1 Cracks 373-Year-Old Unsolved Cipher(2 posts)→
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