Eventually AI will also be able to reliably audit papers and report on fraud.

There may be newer AI methods of fraud, but it will only buy you time. As both progress, committing to record a fraud generated by technology will almost certainly be detected by a later technology.

I would guess that we're within 10 years of being able to automatically audit the majority of papers currently published. That thought must give the authors of fraudulent papers the heebee jeebies.