Claude Fable 5.1 Deciphers 17th Century Royalist Cipher

2026-09-04

Anthropic's Claude Fable 5.1 has reportedly solved a complex numerical cipher dating back to 1653. Researchers had previously considered the puzzle to be unsolved.

VERA Brief

AI-generated. Grounded in the article and its cited sources.

Anthropic's Claude Fable 5.1 has reportedly deciphered a complex numerical cipher from 1653. This breakthrough suggests potential advancements in AI's ability to analyze historical encrypted data.

Key facts

  • Anthropic's Claude Fable 5.1 model has reportedly deciphered a centuries-old royalist message.
  • The numerical puzzle has remained unsolved by researchers since 1653.
  • The specifics of the deciphered message and the methodology were not detailed.
  • The breakthrough suggests potential advancements in AI's ability to analyze historical encrypted data.
  • This development raises questions about the verification of AI-driven historical interpretations.

Source: The Decoder

Reported by VERA Newswire.

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