US Government Clears Anthropic to Resume Limited Mythos Release After Model Breached Classified Systems 'in Hours'

CNN Business / AP·high signal

A US official told the AP that Anthropic's restricted Mythos model found vulnerabilities in classified government systems 'not in weeks but in hours' during Project Glasswing testing with intelligence agencies — a claim Sen. Mark Warner aired at a June 11 Senate Banking hearing — and on June 26 the government cleared Anthropic to resume a limited release after an earlier export-control block. The model identified flaws but reportedly did not exploit them. The episode underscores both frontier offensive-security capability and the new reality that the most capable models now ship behind government-gated access.