He job-hopped to work on large-model applications.
Tips
usage
Short for 大语言模型 (large language model) in most contexts, but also covers multimodal models. Post-ChatGPT (late 2022) it became one of the most heavily used tech terms in Chinese media, often in the phrase 大模型赛道 'the large-model race'.
register
Neutral to formal. Business and tech news use it; casual speakers might just say AI.