NSA chief says Mythos breached ‘almost all’ classified systems in hours

NSA chief says Mythos breached ‘almost all’ classified systems in hoursCivilisational inflection note: This is the moment the frontier-AI cyber-offence question stopped being theoretical for a state actor.The Economist reported that Senator Mark Warner said Gen. Joshua Rudd (NSA / Cyber Command) told him Anthropic’s Mythos, in a red-team exercise on 11 June, broke into nearly all NSA classified systems — in hours, not weeks.New today: The disclosure is circulating widely this weekend and recasts the 12 June export-control shutdown of Fable 5 / Mythos 5 as being about autonomous offensive capability as a whole, not a narrow API jailbreak.Why it matters: It validates the government’s intervention on its own terms and sets a precedent — a single demonstrated capability triggering a national-security recall of a commercially deployed frontier model. Restoration timing is now a governance question, not a patch.• The Economist · Al Jazeera