[SillyUsername]

This is a misconception, we absolutely do know how LLMs work, that's how we can write them and publish research papers.

The idea we don't is tabloid journalism, it's simply because the output is (usually) randomised - taken to mean, by those who lack the technical chops, that programmers "don't know how it works" because the output is indeterministic.

This is not withstanding we absolutely can repeat the output by using not randomisation (temperature 0).