Zhipu says new coding AI developed advanced cyber skills faster than expected
Brief
Chinese AI developer Zhipu has launched GLM-5. 3, a new coding-focused AI model that the company says has developed unexpectedly strong cybersecurity capabilities, putting it close to global leading models in vulnerability discovery while remaining behind them on deeper exploitation tasks. Zhipu’s own testing places GLM-5. 3 slightly ahead of Anthropic’s Mythos 5 and OpenAI’s GPT-5.
6 Sol on CyberGym, a benchmark that tests vulnerability identification and validation. GLM-5. 3 scored 84. 5%, compared with 83. 8% for Mythos 5 and 83. 6% for GPT-5. 6 Sol. But the model trails both competitors by a much wider margin on ExploitBench, where it scored 54. 4%, compared with 78% for Mythos 5 and 76. 5% for GPT-5. 6 Sol. “GLM-5.
3 is the most capable open-weights model for coding, with a 50% improvement over GLM-5. 2 on our in-house Z. ai Code Bench,” Zhipu said in a statement.