Anthropic said on August 21, 2026 that Claude Mythos 5, the cyber-capable model it has limited to vetted defenders since April 2026, is now running vulnerability scans in Claude Security for Enterprise customers. The same announcement lays out plans to bring Mythos 5 into security partners’ products, commits $35 million in credits to a new fund for open-source defense, and previews an expansion of the company’s Cyber Verification Program toward Mythos-class access. The moves mark the third…