Performance evaluations of large language models for customer service. - Fei Li; Yanyan Wang; Yin Xu; Shiling Wang; Junli Liang; Zhengyi Chen; Wenrui Liu; Qiangzhong Feng; Ticheng Duan; Youzhi Huang; Qi Song; Xiangyang Li (Int. J. Mach. Learn. Cybern., 2025)