GPT-6 Astra cracks unsolved 1941 Enigma cipher

// 1h agoNEWS

GPT-6 Astra cracks unsolved 1941 Enigma cipher

Researcher Carter Leffen demonstrated the cryptanalysis capabilities of OpenAI's GPT-6 Astra by decrypting the German Army Enigma cipher MVUEH, an 82-letter message from July 1941 that had remained unsolved for over 80 years. Acting as an autonomous research partner, the model analyzed archival context, implemented simulation scripts, and searched key spaces around a critical crib to recover the complete settings and reveal a unit requesting marching orders.

// ANALYSIS

While large language models cannot break modern public-key cryptography, agentic reasoning models like GPT-6 Astra excel at historical cryptanalysis by synthesizing code generation, simulator execution, and archival context. This demonstration shows that pairing domain clues like historical cribs with programmatic search dramatically accelerates cryptanalytic workflows, proving the power of LLMs as autonomous partners for multi-step research pipelines. It also highlights an expanding niche for frontier AI in archival document recovery and long-standing historical cold cases.

// TAGS

gpt-6-astraopenaicryptanalysisenigmahistorical-researchllm-agentsagent

DISCOVERED

1h ago

2026-09-20

PUBLISHED

1h ago

2026-09-20

RELEVANCE

7/ 10

AUTHOR

AI Search

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GPT-6 Astra cracks unsolved 1941 Enigma cipher