EXAONE 4.0: Unified Large Language Models Integrating Non-reasoning and Reasoning Modes
This work addresses the need for versatile AI models with both usability and reasoning capabilities for researchers and developers, though it appears incremental as an extension of previous versions.
The paper introduces EXAONE 4.0, a unified large language model that integrates non-reasoning and reasoning modes to combine usability with advanced reasoning, achieving superior performance compared to open-weight models and remaining competitive against frontier-class models.
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.