GPT-6 Astra decoded a previously unsolved World War I German ADFGVX radio message from November 27, 1918, listed on Scienceblogs.de's compilation of 50 unsolved ciphers. The model identified "TRUPPENVERSCHIEBUNG" as the encryption key, yielding a plaintext report that an English cruiser arrived at Sevastopol, with an allied squadron following. GPT-6 Astra verified the result against HMS Canterbury's logs; codebreaker George Lasry had solved other messages in the set.
No score is assigned. Sources and their independence are shown in the citation chain below.