GPT-6 Astra cracked a previously unsolved 1941 German Army Enigma message from World War I

So GPT-6 had to figure out the right key, reconstructing the ADFGVX transposition, and recognizing a plausible plaintext from only 170 ciphertext symbols.

Astra autonomously:
> Searched historical archives
> Compared uncertain letters
> Used contextual clues
> Built an Enigma simulator
> Wrote cryptanalysis code
> Ran parallel experiments
> Tested rival keys
> Recovered the plaintext
> Verified the results