It's AI slop. AI coding agents write much more voluminous code, in my experience. The base code is more expansive, and there are more tests, and there are many, many more commits as you keep fixing and fixing and fixing over and over and over.

Don't forget the ridiculously long-winded comments.

I'd bet money they're capturing every change made by any agent, not just at the end of a 'task' (or even a turn). Free training material volume to see what was changed and then what was changed later in the same turn to fix the mistakes introduced.

If they allocate more compute internally than they sell on subs & APIs, then they should be generating more code than all the customers they sell to combined.