A Hacking Competition Shows the Power of China’s Approach to A.I.

The winner of a cybersecurity contest prevailed by relying on an ‘open weight’ Chinese model — another sign that available A.I. systems could already be too powerful to easily regulate.Pavel Gurvich, the chief executive of the cybersecurity company Tenzai. Mr. Gurvich’s firm won the HackerOne contest by using a freely available Chinese A.I. model.