EXAONE 4.0: Unified Large Language Models Integrating Non-reasoning and
  Reasoning Modes
This technical report introduces EXAONE 4.0, which integrates a Non-reasoning
mode and a Reasoning mode to achieve both the excellent usability of EXAONE 3.5
and the advanced reasoning abilities of EXAONE Deep. To pave the way for the
agentic AI era, EXAONE 4.0 incorporates essential features such as agentic tool
use, and its multilingual capabilities are extended to support Spanish in
addition to English and Korean. The EXAONE 4.0 model series consists of two
sizes: a mid-size 32B model optimized for high performance, and a small-size
1.2B model designed for on-device applications. The EXAONE 4.0 demonstrates
superior performance compared to open-weight models in its class and remains
competitive even against frontier-class models. The models are publicly
available for research purposes and can be easily downloaded via
https://huggingface.co/LGAI-EXAONE.
68774564257d4f04353707dc
LG AI Research
68774564257d4f04353707de
Kyunghoon Bae
68774564257d4f04353707df
Eunbi Choi
claimed_verified
2025-07-21T08:30:22.879Z
6044fd39e6aa3e130cb92867
https://cdn-avatars.huggingface.co/v1/production/uploads/6044fd39e6aa3e130cb92867/L5hb8vpHY6SKMEL-Xacma.jpeg
Eunbi Choi
user
unbiarirang
68774564257d4f04353707e0
Kibong Choi
68774564257d4f04353707e1
Stanley Jungkyu Choi
68774564257d4f04353707e2
Yemuk Choi
68774564257d4f04353707e3
Kyubeen Han
68774564257d4f04353707e4
Seokhee Hong
68774564257d4f04353707e5
Junwon Hwang
claimed_verified
2025-07-18T12:31:51.563Z
63c50e590c24c8b53958f75e
https://cdn-avatars.huggingface.co/v1/production/uploads/1673858632881-noauth.png
Junwon Hwang
user
nuxlear
68774564257d4f04353707e6
Taewan Hwang
claimed_verified
2025-07-21T08:30:18.104Z
6652d7b8258f5fad31db3c22
/avatars/0ac7f832d58328bf93a3450736563fff.svg
h
user
taewanh
68774564257d4f04353707e7
Joonwon Jang
claimed_verified
2025-07-16T15:16:04.357Z
64bf77338e051085ba405d66
/avatars/dd8b1f976c67c8b592f7d1e88573fa8b.svg
Joonwon
user
lainshower
68774564257d4f04353707e8
Hyojin Jeon
claimed_verified
2025-07-16T15:06:02.499Z
6578953c1e4ac8627fb0fca9
/avatars/e64a4c288424c38f3af0c299ff35fa93.svg
jeon
user
gywlssww
68774564257d4f04353707e9
Kijeong Jeon
68774564257d4f04353707ea
Gerrard Jeongwon Jo
68774564257d4f04353707eb
Hyunjik Jo
68774564257d4f04353707ec
Jiyeon Jung
68774564257d4f04353707ed
Euisoon Kim
claimed_verified
2025-07-21T08:30:26.961Z
65e93638014f4be34f615514
/avatars/e9b0a35d0bdf2c8cc7a3ffa177307c1d.svg
Eui Soon Kim
user
Euisoon
68774564257d4f04353707ee
Hyosang Kim
68774564257d4f04353707ef
Jihoon Kim
68774564257d4f04353707f0
Joonkee Kim
68774564257d4f04353707f1
Seonghwan Kim
68774564257d4f04353707f2
Soyeon Kim
68774564257d4f04353707f3
Sunkyoung Kim
claimed_verified
2025-07-16T15:06:06.683Z
628efeff6d8dcc7ab5263881
/avatars/1e894ccd7ba206a755b0b9af9f22ead1.svg
Sunkyoung Kim
user
Sunkyoung
68774564257d4f04353707f4
Yireun Kim
claimed_verified
2025-07-16T15:06:08.766Z
660260cf1737e5cd4a826550
https://cdn-avatars.huggingface.co/v1/production/uploads/660260cf1737e5cd4a826550/AlSfoM2WtqPjLtYR6x7Wf.jpeg
Yireun Kim
user
yireun
68774564257d4f04353707f5
Yongil Kim
68774564257d4f04353707f6
Youchul Kim
68774564257d4f04353707f7
Edward Hwayoung Lee
68774564257d4f04353707f8
Gwangho Lee
claimed_verified
2025-07-18T13:58:36.330Z
67a5b47a27f574e46d4e4ccb
https://cdn-avatars.huggingface.co/v1/production/uploads/noauth/h9wdua7oLJ89Qz2UhDIVT.png
Gwangho Lee
user
karlo-lee
68774564257d4f04353707f9
Haeju Lee
claimed_verified
2025-07-21T08:30:25.028Z
67d908e67f61dda9ea69b2b1
/avatars/a04e456d1d5ab242af649735c7d9a07f.svg
Haeju Lee
user
lhg912
68774564257d4f04353707fa
Honglak Lee
68774564257d4f04353707fb
Jinsik Lee
68774564257d4f04353707fc
Kyungmin Lee
claimed_verified
2025-07-16T15:06:04.788Z
6241349b9d7bad9474ed254a
https://cdn-avatars.huggingface.co/v1/production/uploads/6241349b9d7bad9474ed254a/b09yztloFKapHBFPlhkQD.jpeg
Kyungmin Lee
user
lkm2835
68774564257d4f04353707fd
Sangha Park
68774564257d4f04353707fe
Young Min Paik
claimed_verified
2025-07-18T13:58:37.969Z
64bb62c6976343e90a2ecd88
/avatars/6031f25dd8df3913816d1272c5909c67.svg
Young Min Paik
user
ympaik
68774564257d4f04353707ff
Yongmin Park
68774564257d4f0435370800
Youngyong Park
68774564257d4f0435370801
Sanghyun Seo
claimed_verified
2025-07-21T08:30:20.898Z
632d5db27bad38a82f76559c
https://cdn-avatars.huggingface.co/v1/production/uploads/632d5db27bad38a82f76559c/KFmE4nXd5UqR7uMuDf2RI.png
Sanghyun Seo
user
shseo
68774564257d4f0435370802
Sihoon Yang
68774564257d4f0435370803
Heuiyeen Yeen
68774564257d4f0435370804
Sihyuk Yi
68774564257d4f0435370805
Hyeongu Yun
claimed_verified
2025-08-06T19:33:46.681Z
635e5d42106f984574c48729
https://cdn-avatars.huggingface.co/v1/production/uploads/635e5d42106f984574c48729/ZOv_nJtmqds-9VAMT8sQY.png
Hyeongu Yun
user
yhg0112
EXAONE 4.0: Unified Large Language Models Integrating Non-reasoning and
  Reasoning Modes
This technical report introduces EXAONE 4.0, which integrates a Non-reasoning
mode and a Reasoning mode to achieve both the excellent usability of EXAONE 3.5
and the advanced reasoning abilities of EXAONE Deep. To pave the way for the
agentic AI era, EXAONE 4.0 incorporates essential features such as agentic tool
use, and its multilingual capabilities are extended to support Spanish in
addition to English and Korean. The EXAONE 4.0 model series consists of two
sizes: a mid-size 32B model optimized for high performance, and a small-size
1.2B model designed for on-device applications. The EXAONE 4.0 demonstrates
superior performance compared to open-weight models in its class and remains
competitive even against frontier-class models. The models are publicly
available for research purposes and can be easily downloaded via
https://huggingface.co/LGAI-EXAONE.
EXAONE 4.0 integrates non-reasoning and reasoning modes, supports agentic tool use, and offers multilingual capabilities, demonstrating superior performance in its class.
Non-reasoning mode Reasoning mode agentic tool use multilingual capabilities EXAONE 4.0 EXAONE Deep EXAONE 3.5 mid-size 32B model small-size 1.2B model open-weight models frontier-class models