# ChatGPT-6 Astra cracks 217-year-old Napoleonic code in just six hours — single-prompt AI run solves 24 rows of custom symbols from a single image, reveals lost troop orders

> An AI engineer used GPT-6 Astra to reveal the contents of a cipher that hadn’t been read since the Napoleonic Wars.

- **Source:** [Tom's Hardware](https://www.tomshardware.com/tech-industry/artificial-intelligence/chatgpt-6-astra-cracks-217-year-old-napoleonic-code-in-just-six-hours-single-prompt-ai-run-solves-24-rows-of-custom-symbols-from-a-single-image-reveals-lost-troop-orders?utm_source=gearopen.com&utm_medium=referral&utm_campaign=feed&utm_content=6ac26d8303cac6134b67bfba)
- **Published:** 2026-10-04
- **Category:** AI & Bots
- **Tags:** #chatgpt #openai #ai
- **Canonical:** http://localhost:4321/a/6ac26d8303cac6134b67bfba

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_GearOpen's distilled summary. The full original article is published at Tom's Hardware (source link above); GearOpen does not republish the source's full text._