Cheaper for now, since venture capitalist cash is paying to keep those extremely expensive servers running. The AI experiments at my work (automatically generating documentation) have got about an 80% reject rate - sometimes they’re not right, sometimes they’re not even wrong - and it’s not really an improvement on time having to review it all versus just doing the work.
No doubt there are places where AI makes sense; a lot of those places seem to be in enhancing the output of someone who is already very skilled. So let’s see how “cheaper” works out.