Anthropic held cyberthreat briefings with agency CIOs last month

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ByAlexandra Kelley,
Staff Correspondent, Nextgov/FCW

June 2, 2026 03:29 PM ET

Discussions included how to defend digital assets following the debut of advanced AI models, like Anthropic’s Mythos.

Leading artificial intelligence developer Anthropic hosted briefing sessions for federal agency chief information officers in early May, several sources familiar with the sessions told Nextgov/FCW.

Meetings occurred May 7 and May 8. While briefing topics varied, they focused on defending digital assets from cyber threats powered by advanced AI models including Anthropic’s Mythos Preview, the sources said.

Other branches of government have been informed of Mythos’s capabilities. In mid-May, lawmakers on the House Homeland Security Committee received a briefing with Anthropic executives on Mythos’s ability to detect software vulnerabilities.

The launch of Mythos Preview in early April came alongside Anthropic’s announcement of Project Glasswing, an initiative that granted access to the...

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