AnalysisAI ModelsOctober 1, 2026

GPT-6 Astra deciphers 217-year-old Napoleonic cipher in 6 hours

Read original source →runtimewire.com

SentinelOne engineer Carter Church used GPT-6 Astra to decode a March 1809 letter to General Auguste de Marmont, unread for 217 years, from a single scanned image. The letter held 1,300 cipher units and 155 distinct signs; a partial key from historian Daniel Tant covered only 33 values (~435 units).

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