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
Published: 2026-01-05 02:30:59

Abstract: 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.