AI Developer Uses GPT-6 Astra to Crack 108-Year-Old WW1 Code

AI developer Prinz used OpenAI's GPT-6 Astra model to decrypt a 108-year-old German radio message from World War I. The key was the word TRUPPENVERSCHIEBUNG, and the result matched military logs: British cruiser HMS Canterbury arrived in Sevastopol on November 24, 1918.

• Message from list of 50 unsolved ciphers on Scienceblogs.de decrypted for first time
• Key was the word TRUPPENVERSCHIEBUNG
• Cruiser arrival date matched logs: November 24, 1918
• GPT-6 Astra released on September 3, 2026