An AI developer named Prinz used OpenAI’s GPT-6 Astra, released on September 3, 2026, to decipher a 108-year-old encrypted German WW1 radio message. Prinz selected the code from a list of fifty unsolved ciphers on Scienceblogs.de. The message was addressed to the German High Command and used a shifting letter grid; Astra applied the keyword “TRUPPENVERSCHIEBUNG” to solve it. The decoded radio alert read: “AN ENGLISH CRUISER ARRIVED AT SEVASTOPOL ON THE ?4TH AN ALLIED SQUADRON FOLLOWS ON THE 26TH.” Astra checked the result against military logs and found the cruiser’s arrival aligned with British cruiser HMS Canterbury in Sevastopol, Crimea, on November 24, 1918, with the Allied squadron arriving on November 26. The ‘?’ was likely a transmission typo.