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.
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LG AI Research
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Kibong Choi
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Stanley Jungkyu Choi
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Junwon Hwang
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Taewan Hwang
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Hyojin Jeon
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jeon
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Kijeong Jeon
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Hyosang Kim
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Sunkyoung Kim
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Yireun Kim
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Yireun Kim
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Yongil Kim
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Youchul Kim
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Edward Hwayoung Lee
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Gwangho Lee
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Haeju Lee
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Sangha Park
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Young Min Paik
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Sihoon Yang
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Heuiyeen Yeen
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Hyeongu Yun
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