# GLM-5.3 Completed Three of 13 Simulated Cyberattack Scenarios By Simon Yoon Canonical URL: https://www.tokenpost.com/news/technology/43186 Published: 2026-10-29T04:49:25.000Z Updated: 2026-10-29T04:49:25.000Z Section: Technology > The exercises recorded no refusals on offensive tasks and included automated scripting and data extraction. Z.AI’s GLM-5.3 completed three of 13 simulated multistage cyberattack scenarios at least once, offering a measure of the capabilities available in an openly distributed AI model. The CyScenarioBench exercises involved multiple stages. GLM-5.3 did not refuse any of the offensive tasks and automated scripting and data extraction during the exercises. The scenarios ran in simulations, so the results do not show GLM-5.3 attacking live systems. GLM-5.3’s open weights are available to download, allowing users to run copies outside Z.AI’s own API service. That distribution gives the developer less direct control over how those copies are used. [TokenPost previously covered GLM-5.3’s exploit-benchmark results](). That coverage examined exploit attempts; the newer evaluation measured performance across multistage scenarios. Both sets of findings concern controlled testing, not a confirmed real-world cyberattack. ## Links in this article - [TokenPost previously covered GLM-5.3’s exploit-benchmark results](https://www.tokenpost.com/news/technology/31015)