K-EXAONE Technical Report
Authors: name: Eunbi Choi, name: Kibong Choi, name: Seokhee Hong, name: Junwon Hwang, name: Hyojin Jeon, name: Hyunjik Jo, name: Joonkee Kim, name: Seonghwan Kim, name: Soyeon Kim, name: Sunkyoung Kim, name: Yireun Kim, name: Yongil Kim, name: Haeju Lee, name: Jinsik Lee, name: Kyungmin Lee, name: Sangha Park, name: Heuiyeen Yeen, name: Hwan Chang, name: Stanley Jungkyu Choi, name: Yejin Choi, name: Jiwon Ham, name: Kijeong Jeon, name: Geunyeong Jeong, name: Gerrard Jeongwon Jo, name: Yonghwan Jo, name: Jiyeon Jung, name: Naeun Kang, name: Dohoon Kim, name: Euisoon Kim, name: Hayeon Kim, name: Hyosang Kim, name: Hyunseo Kim, name: Jieun Kim, name: Minu Kim, name: Myoungshin Kim, name: Unsol Kim, name: Youchul Kim, name: YoungJin Kim, name: Chaeeun Lee, name: Chaeyoon Lee, name: Changhun Lee, name: Dahm Lee, name: Edward Hwayoung Lee, name: Honglak Lee, name: Jinsang Lee, name: Jiyoung Lee, name: Sangeun Lee, name: Seungwon Lim, name: Solji Lim, name: Woohyung Lim, name: Chanwoo Moon, name: Jaewoo Park, name: Jinho Park, name: Yongmin Park, name: Hyerin Seo, name: Wooseok Seo, name: Yongwoo Song, name: Sejong Yang, name: Sihoon Yang, name: Chang En Yea, name: Sihyuk Yi, name: Chansik Yoon, name: Dongkeun Yoon, name: Sangyeon Yoon, name: Hyeongu Yun
Organization: LG AI Research

This technical report presents K-EXAONE, a large-scale multilingual language model developed by LG AI Research. K-EXAONE is built on a Mixture-of-Experts architecture with 236B total parameters, activating 23B parameters during inference. It supports a 256K-token context window and covers six languages: Korean, English, Spanish, German, Japanese, and Vietnamese. We evaluate K-EXAONE on a comprehensive benchmark suite spanning reasoning, agentic, general, Korean, and multilingual abilities. Across these evaluations, K-EXAONE demonstrates performance comparable to open-weight models of similar size. K-EXAONE, designed to advance AI for a better life, is positioned as a powerful proprietary AI foundation model for a wide range of industrial and research applications.