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Chinese AI model completes complex cyberattacks in tests, raises concerns

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Chinese AI model completes complex cyberattacks in tests, raises concerns

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Z.AI's GLM-5.3 completed three of 13 multi-stage cyberattack scenarios in controlled simulations, according to Irregular, though it trailed leading US models in separate tests

Z.AI, also known as Zhipu AI, launched GLM-5.3 in August, having delayed its ​release by two weeks for additional safety testing (Photo: Reuetrs)

Reuters BEIJING 3 min read Last Updated : Oct 29 2026 | 11:47 AM IST

Chinese firm Z.AI's flagship AI model carried out complex cyberattacks in controlled simulations and repeatedly ignored instructions in separate tests, according to a report by AI security research firm Irregular.

The GLM-5.3 model successfully completed 3 of 13 multi-stage cyberattack scenarios at least once, the strongest performance Irregular has recorded from an openly available AI model.

GLM-5.3 still trails leading US models in Irregular's tests. OpenAI's GPT-6 ‌Astra, for example, completed 9 of 10 scenarios in a separate ​assessment, although the tests were not identical.

The findings ​underscore concerns that increasingly capable AI models lower the technical barriers to sophisticated cyberattacks. This is particularly the case with many Chinese ​AI models like GLM-5.3 that are open-weight, meaning they are available for users to download, modify and operate independently.

Beijing-based Z.AI, one of China's leading AI startups, did not immediately respond to a request for comment.

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