GPT-6 Astra Solves a WWI German Radio Cipher

GPT-6 Astra successfully deciphered a previously unsolved German WWI radio message encrypted using the ADFGVX cipher method, revealing a November 27, 1918 transmission about an English cruiser arriving at Sevastopol and an Allied squadron following on the 26th. The AI model identified the encryption key as "TRUPPENVERSCHIEBUNG" and decoded the 170-character message, solving a cipher that had eluded codebreakers despite dozens of similar messages being successfully decrypted.