Anthropic claims popular Chinese AI model has Mythos-class hacking abilities

Anthropic has released a new report, claiming that Zhipu AI's GLM-5.3 AI model can be used to generate malicious content, with weak safeguarding. The company claims that the AI model can be used for cyberattacks, and that its safeguards can be bypassed using several methods.

Anthropic's report comes amidst a chorus of calls for a slowdown of AI development, with the company seeking governance and regulation. Despite CEO Dario Amodei's calls for pacing the AI frontier, Claude Opus 5.5 and Claude Sonnet 5.5 were released just days after alarms were raised.

Now, the closed-source AI company, which is currently eyeing an IPO, says that Chinese open-weight models can be abused and can generate harmful content. Anthropic cites the Center for AI Standards and Innovation's own report, published in late September, which claims that GLM-5.3 can fully automate exploits on a similar level to Anthropic's own unreleased Claude Mythos AI model, which spurred the company to develop Project Glasswing, an effort …