China’s Z.ai claims it can match Mythos on cybersecurity
GLM-5.2 can’t match Anthropic or OpenAI on general tasks, but the gap has closed on finding bugs.
by Terrence O'Brien
Jun 28, 2026, 9:42 PM UTC
Image: Cath Virginia / The Verge, Getty Images
Terrence O'Brien is the Verge’s weekend editor. He’s covered the tech industry for over 18 years and knows a thing or two about synths.
China’s Zhipu AI (Z.ai) released its open-weight GLM-5.2, and some researchers have claimed that it matches Mythos in certain bug-finding and cybersecurity scenarios. While GLM lags behind models from Anthropic and OpenAI in other, more general tasks, it seems that China has dramatically reduced the gap in the capabilities between its models and those of the US.
This level of advancement is particularly concerning to the US government, which has worked to restrict China’s access to powerful models like Anthropic’s Mythosand Fable, as well as the hardware necessary to...
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