OpenAI's GPT-6 Astra Decodes 1918 German Military Cipher, Demonstrating Breakthrough Cryptanalysis Capability

OpenAI's newly released GPT-6 Astra model has successfully decoded a 170-symbol German military radio message that remained unsolved for 108 years, marking a significant milestone in AI-assisted historical cryptanalysis. The model solved a November 1918 ADFGVX cipher transmission using the keyword TRUPPENVERSCHIEBUNG (German for "troop movement"), revealing intelligence about Allied naval movements in the Black Sea during the final weeks of World War I. The decoded message was subsequently verified against historical naval logs, including HMS Canterbury records, confirming the accuracy of the decryption.