Anthropic raises alarm over elite hacking ability of Chinese firm Z.ai’s GLM-5.3

SCMP TechSeptember 30, 2026en

The US artificial intelligence giant Anthropic has warned of the potential danger posed by Chinese firm Z.ai’s GLM-5.3, with the open-weight model showing a troubling mix of powerful hacking abilities but weak safety constraints. GLM-5.3 almost matches Anthropic’s most advanced model in terms of its cyber capabilities, but has far weaker safeguards, meaning there is greater potential for the model to be co-opted by bad actors, according to the San Francisco-based firm. In a report released on...

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