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AI Lowers Cyber Skill Barrier: Anthropic Study Shows Novices Can Launch Complex Attacks

  • On Tuesday, Anthropic warned that GLM-5, an open-weight model from Chinese lab Zhipu, possesses powerful hacking abilities nearly matching its frontier model, Claude Mythos Preview, while lacking robust safety constraints.
  • The San Francisco-based firm reported that GLM-5 safeguards can be bypassed in up to 100% of tests because the model's public weights allow developers to easily strip protections.
  • Tests show the Chinese model completed 50 out of 410 exploit attempts, compared with 56 for Mythos Preview; GLM-5 achieved a full control-flow hijack in 4% of 100 tasks on internal benchmarks.
  • Researchers used GLM-5 to discover unknown flaws in a JavaScript engine, chaining them into a webpage that reads files from a visitor's computer; Anthropic has disclosed the vulnerabilities to the maintainer.
  • NIST's Center for AI Standards and Innovation labeled GLM-5 "the most cyber-capable open-weight model released to date," noting it lags the US frontier by about four months on aggregate cyber benchmarks.
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Lean Left

According to the researchers, attackers can bypass the protection of the model in 64-100% of cases using simple methods.

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Anthropic said China's GLM-5.3 AI model can autonomously find vulnerabilities and create end-to-end exploits.

·Kyiv, Ukraine
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Center

Antropic warned that while China's Z.ai's latest open-weight artificial intelligence (AI) model, 'GLM-5.3,' possesses cyberattack capabilities approaching those of its own top-tier model, its safeguards could be relatively easily neutralized. On the 1st, Hong

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anthropic.com broke the news on Tuesday, September 29, 2026.
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