GPT-6 Astra decrypts 1941 Enigma radio message

Bloomberg employee Carter Leffen reported that GPT-6 Astra successfully decrypted a German military radio message from July 10, 1941, which had remained unsolved in the CryptoCellar archive since 2005. Astra autonomously searched historical archives, built an Enigma simulator, and wrote cryptanalysis code to solve the 82-character message. The breakthrough was aided by using the word 'Rosenow' as a crib, derived from another previously decrypted message. The process, conducted between September 14 and 15, involved Astra and multiple AI agents working in parallel.