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Claude Fable 5.1 decoded a centuries-old royalist message hidden in plain sight since 1653

This story is from 2026-09-03. It is preserved in the archive; the latest stories are on the live feed.

Anthropic's Claude Fable 5.1 appears to have cracked a centuries-old number puzzle that researchers considered unsolved. The article Claude Fable 5.1 decoded a centuries-old royalist message hidden in plain sight since 1653 appeared first on The Decoder .

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  1. 2026-09-03 14:15 · The Decoder
    Claude Fable 5.1 decoded a centuries-old royalist message hidden in plain sight since 1653

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