# Fable 5.1 cracks Cyphral Distich, a 370-year-old cipher

An entity or project called Fable 5.1 has reportedly solved the Cyphral Distich, a cipher that had gone unbroken for roughly 370 years. The claim, surfaced on Hacker News, would resolve a long-standing puzzle if independently verified. It is mainly of interest to cryptography and puzzle enthusiasts rather than the wider public.

**Importance:** 2/5

## Sources

### Technology
- [Hacker News](https://www.vals.ai/blogs/fable-solves-cyphral-distich) — Sun, 13 Sep 2026 21:06:13 +0000