Claude Fable 5.1 cracks 1653 royalist code in 44 minutes

anthropic's claude fable 5.1 solved the cyphral distich, a centuries-old number puzzle created by sir thomas urquhart in 1653. the puzzle consists of two lines of 32 numbers, which point to specific words in urquhart's publication. fable 5.1 cracked the code in 44 minutes without human assistance, using systematic trial and error. this achievement showcases the model's persistence and ability to solve complex problems. the solution reveals a message supporting king charles the second.