GPT-6 Astra Cracks an Enigma Message Unsolved Since 2005

jedisct1 · x · 2026-09-22

Cryptographer Frank Denis (jedisct1) reports that OpenAI's GPT-6 Astra broke an Enigma message that had resisted solution since 2005, with a demo link attached. If verified, it's a striking capability showcase for frontier models on cryptographic puzzles, though full technical details aren't provided.

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