13 of 14 Models Write Messier Code Than the Human Who Fixed the Same Bug

We measured whether AI-written code is messier than human-written code, across 500 real bugs where a human fix already exists. Thirteen of the fourteen models we tested raised a function's complexity or added dead code more often than the person who fixed the same bug. One tied. None did better. We measured with pyscn, our own Python analyzer. It...