China’s leading artificial intelligence model companies are beginning to curb the cybersecurity capabilities of their most advanced open-weight models, following a string of high-profile AI hacking incidents involving both US and Chinese companies. Earlier this month, Chinese technology giant Tencent Holdings said it had stripped its latest Hy4 model of its cyber-hacking capabilities while retaining its cyber defence capabilities, following a similar move by Moonshot AI with its Kimi K3.1 Pro.