Cryptography

GPT-6 Astra Breaks a 108-Year-Old WWI Cipher—And Raises Hard Questions

OpenAI’s GPT-6 Astra reportedly deciphered a 108-year-old WWI German radio cipher, producing plaintext that aligns with Royal Navy records—yet the method behind the solve remains a mystery.

Claude Fable 5.1 Cracks a 373-Year-Old Scottish Cipher in 44 Minutes

Anthropic’s Claude Fable 5.1 deciphered a 64-number Scottish cipher that stumped cryptographers for 373 years, revealing a hidden prayer in under an hour—entirely unsupervised.