{"slug": "claude-fable-solves-a-historical-cipher", "title": "Claude Fable Solves a Historical Cipher", "summary": "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.", "body_md": "## Claude Fable Solves a Historical Cipher\n\nClaude Fable 5.1 [solved](https://www.vals.ai/blogs/fable-solves-cyphral-distich) a 370-year-old cipher in forty-four minutes.\n\nThis 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.\n\nTags: [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/) \n\n[Posted on September 9, 2026 at 7:08 AM](https://www.schneier.com/blog/archives/2026/09/claude-fable-solves-a-historical-cipher.html)\t\t\t•\n\t\t\t[0 Comments](https://www.schneier.com/blog/archives/2026/09/claude-fable-solves-a-historical-cipher.html#respond)", "url": "https://wpnews.pro/news/claude-fable-solves-a-historical-cipher", "canonical_source": "https://www.schneier.com/blog/archives/2026/09/claude-fable-solves-a-historical-cipher.html", "published_at": "2026-09-09 11:08:26+00:00", "updated_at": "2026-09-09 11:38:44.063896+00:00", "lang": "en", "topics": ["artificial-intelligence", "ai-research"], "entities": ["Claude Fable 5.1", "Bruce Schneier", "The Guardian"], "alternates": {"html": "https://wpnews.pro/news/claude-fable-solves-a-historical-cipher", "markdown": "https://wpnews.pro/news/claude-fable-solves-a-historical-cipher.md", "text": "https://wpnews.pro/news/claude-fable-solves-a-historical-cipher.txt", "jsonld": "https://wpnews.pro/news/claude-fable-solves-a-historical-cipher.jsonld"}}