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.

翻译：本技术报告介绍了EXAONE 4.0，它集成了非推理模式与推理模式，旨在同时实现EXAONE 3.5的卓越易用性与EXAONE Deep的高级推理能力。为迎接智能体AI时代，EXAONE 4.0引入了智能体工具使用等关键特性，并将其多语言能力扩展至支持英语、韩语及西班牙语。EXAONE 4.0模型系列包含两种规模：针对高性能优化的中等规模320亿参数模型，以及为端侧应用设计的小规模12亿参数模型。EXAONE 4.0在同类开源权重模型中展现出卓越性能，即使与前沿模型相比仍具竞争力。该系列模型已公开发布供研究使用，可通过 https://huggingface.co/LGAI-EXAONE 便捷下载。