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Chinese Cyber Stocks Jump as Anthropic’s Mythos Unveils 1,000 Flaws

4/23/2026

Summary

Story summary

Chinese cybersecurity stocks rose after Anthropic announced its Claude Mythos Preview, despite the model being unavailable in China.
Anthropic labeled China an “adversarial nation” and excluded Chinese companies from its Project Glasswing consortium.
360 Digital Security Group said its AI-powered Vulnerability Discovery Agent uncovered almost 1,000 unknown flaws, including in Microsoft Office, prompting analysts to warn that Mythos could spur higher cybersecurity spending.

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Story summary

Chinese cybersecurity stocks rose after Anthropic announced its Claude Mythos Preview, despite the model being unavailable in China.
Anthropic labeled China an “adversarial nation” and excluded Chinese companies from its Project Glasswing consortium.
360 Digital Security Group said its AI-powered Vulnerability Discovery Agent uncovered almost 1,000 unknown flaws, including in Microsoft Office, prompting analysts to warn that Mythos could spur higher cybersecurity spending.