I'm dubious of such a claim, both because it strikes me as unlikely but moreso because if it happened I would expect them to clamp down and not allow that information to get out. The only way it makes sense for them to allow the press to cover that is if it's some sort of propaganda or psyop flex of "Oh noes, look out China, our AI company built an AI so good that it broke into the NSA super fast. Better watch out."