Claude Fable Solves a Historical Cipher

Claude Fable 5.1, an AI model, solved a 370-year-old cipher in forty-four minutes, according to a blog post by Bruce Schneier on September 9, 2026. The post highlights AI's proficiency in tasks involving extensive searching and testing, as previously noted by Schneier in The Guardian.

Claude Fable Solves a Historical Cipher Claude Fable 5.1 solved https://www.vals.ai/blogs/fable-solves-cyphral-distich a 370-year-old cipher in forty-four minutes. This tracks with what I wrote https://www.theguardian.com/commentisfree/2026/aug/25/ai-mathematics-careers about AIs doing mathematics: It’s good at things that involve lots of searching and testing. Tags: AI https://www.schneier.com/tag/ai/ , cryptography https://www.schneier.com/tag/cryptography/ , history of cryptography https://www.schneier.com/tag/history-of-cryptography/ , mathematics https://www.schneier.com/tag/mathematics/ Posted on September 9, 2026 at 7:08 AM https://www.schneier.com/blog/archives/2026/09/claude-fable-solves-a-historical-cipher.html • 0 Comments https://www.schneier.com/blog/archives/2026/09/claude-fable-solves-a-historical-cipher.html respond