It's from the link I posted. Claude's own team in January trying to do exactly what you suggested and ending with results that are less than promising. It's their blog. I assumed it represented the pinnacle of their research.

We're getting a point where anecdotes are being used in place of reason. I'd think you want to ask "how many bug bounties are earned by humans vs AI assistants?" If there's money to be made in finding 0-days then shouldn't there be ample evidence of this?