Zhipu launches flagship model GLM-5.3 as China seeks Mythos-level edge in cyber defence

SCMP TechAugust 14, 2026en

Chinese artificial intelligence firm Zhipu, also known as Z.ai, has unveiled its flagship GLM-5.3 model, saying it beat Anthropic’s frontier Mythos 5 model in a key cybersecurity test, as China races to counter Western advances in AI defence. Beijing-based Zhipu said GLM-5.3 achieved a success rate of 84.5 per cent on CyberGym, a benchmark that measures whether models can identify and validate security flaws from source code. That was above Anthropic’s Mythos at 83.8 per cent and OpenAI’s...

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• OpenAI
• Anthropic
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