Anthropic dispute unsettles US AI security research and cyber defenses

A feud over access to Anthropic's Fable 5 and Mythos 5 has security leaders warning that punitive moves could chill defensive AI research and weaken U.S. cyber defenses, as the administration weighs new AI security rules and a forthcoming vulnerability-clearinghouse, with critics arguing the conflict risks advantaging adversaries and undermining defenders' capabilities.