Claude C compiler is 100k LOC that doesn’t do anything useful, and cost $20k plus the cost of an expert engineer creating a custom harness and babysitting it.

But the most important thing is that they were reverse engineering gcc by using it as an oracle. And it had gcc and thousands of other c compilers in its training set.

So if you are a large corporation looking to copy GPL code so that you can use it without worrying about the license, and the project you want to copy is a text transformer with a rigorously defined set of inputs and outputs, have at it.