Dongkeun Yoon

About Me

Hello! I am a PhD student at KAIST AI co-advised by Alice Oh and Minjoon Seo.

My main research focus is multilinguality. There are two reasons for this:

1. I find the idea of solving low-resource challenges through cross-lingual transfer genuinely fascinating.
2. Many low-resource language communities are still underrepresented in AI, which I believe is an important problem to address.

Currently, I’m experimenting ideas to reduce unfairness in LLM tokenizers across languages. Please feel free to reach out if you’d like to discuss anything 🙂

Research Interests

• LLMs, Multilingualism, and Tokenizers

Publications

*Equal Contribution

Conference

1. Reasoning Models Better Express Their Confidence
   [Dongkeun Yoon], Seungone Kim, Sohee Yang, Sunkyoung Kim, Soyeon Kim, Yongil Kim, Eunbi Choi, Yireun Kim, Minjoon Seo
   NeurIPS 2025

2. M-Prometheus: A Suite of Open Multilingual LLM Judges
   José Pombal, [Dongkeun Yoon], Patrick Fernandes, Ian Wu, Seungone Kim, Ricardo Rei, Graham Neubig, André FT Martins
   COLM 2025

3. The BiGGen Bench: A Principled Benchmark for Fine-grained Evaluation of Language Models with Language Models
   Seungone Kim, Juyoung Suk, Ji Yong Cho, Shayne Longpre, Chaeeun Kim, [Dongkeun Yoon], …
   NAACL 2025 (🎉 Best Paper)

4. LangBridge: Multilingual Reasoning Without Multilingual Supervision
   [Dongkeun Yoon], Joel Jang, Sungdong Kim, Seungone Kim, Sheikh Shafayat, Minjoon Seo
   ACL 2024

5. Gradient Ascent Post-training Enhances Language Model Generalization
   [Dongkeun Yoon*], Joel Jang*, Sungdong Kim, Minjoon Seo
   ACL 2023

6. Knowledge Unlearning for Mitigating Privacy Risks in Language Models
   Joel Jang, [Dongkeun Yoon], Sohee Yang, Sungmin Cha, Moontae Lee, Lajanugen Logeswaran, Minjoon Seo
   ACL 2023

7. Improving Graph-based Document-Level Relation Extraction Model with Novel Graph Structure
   Seongsik Park, [Dongkeun Yoon], Harksoo Kim
   CIKM 2022

Technical Report

1. K-EXAONE Technical Report
   LG AI Research
   Jan 2026

Preprint

1. A 2-step Framework for Automated Literary Translation Evaluation: Its Promises and Pitfalls
   Sheikh Shafayat, [Dongkeun Yoon], Woori Jang, Jiwoo Choi, Alice Oh, Seohyon Jung
   arXiv preprint, Dec 2024

2. MM-Eval: A Multilingual Meta-Evaluation Benchmark for LLM-as-a-Judge and Reward Models
   Guijin Son*, [Dongkeun Yoon*], Juyoung Suk, Javier Aula-Blasco, Mano Aslan, Vu Trong Kim, …
   arXiv preprint, Oct 2024