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anthropic_research · Sep 29, 2026 · research

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GLM-5.3 and the Spread of Advanced Cyber Capabilities

Anthropic ResearchSep 29, 2026
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In brief

GLM-5.3 can autonomously build end-to-end cyber exploits, but unlike other frontier models, it was released without meaningful safeguards to limit misuse.

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GLM-5.3 and the Spread of Advanced Cyber Capabilities

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