Why language models keep solving the same problem twice (and how to make them stop)

Imagine doing your taxes every year from scratch, never keeping your notes from last year — that's what LLMs do, and researchers just built a filing system that lets them reuse solutions for 16–291× cheaper.

This means expensive AI reasoning can be cached like regular software, turning expensive one-off thinking into efficient, reusable logic that's also fully explainable.