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An unsolved 1941 German Army Enigma message, broken by GPT-6 Astra

Carter Leffen documents a run in which GPT-6 Astra searched historical archives, weighed uncertain letters, built its own Enigma simulator, wrote cryptanalysis code, tested competing keys in parallel and recovered the plaintext of a message unsolved since 1941.

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GPT-6 Astra
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Carter Leffen@carterleffen

Two days ago, GPT-6 Astra broke a yet unsolved German Army Enigma message from 1941. Amazingly Astra was able to autonomously:

- Search historical archives
- Compare uncertain letters
- Find contextual clues
- Build an Enigma simulator
- Write cryptanalysis code
- Run parallel experiments
- Test competing keys
- Recover the plaintext
- Cross-check the results

1/n

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