Zuckerberg’s reason for refusing to coordinate on AI safety is now the argument in an antitrust suit against four rivals.

Mark Zuckerberg declined to join a coordination effort on AI safety, a stance cited in a new antitrust complaint filed by four competitors. The lawsuit claims the industry’s “pacing push” is driven by self-interest rather than safety concerns. Microsoft AI chief Mustafa Suleyman said controlling advanced AI is a huge challenge, defended regulation, and argued the safety shift is industry-driven.