Senator Mark Warner, vice chair of the Senate Intelligence Committee, testified on June 11, 2026 that, according to Gen. Joshua Rudd, head of the NSA and U.S. Cyber Command, an Anthropic frontier model broke into almost all of the NSA's classified systems "not in weeks, but in hours." The model in question is Claude Mythos, part of a new "Mythos class" created by Anthropic, and observers increasingly see this capability as the reason behind Washington pressing Anthropic to disable its most powerful models.
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