collaborators

6 papers

cs.CL2026

Thunder-KoNUBench: A Corpus-Aligned Benchmark for Korean Negation Understanding

Sungmok Jung, Yeonkyoung So, Joonhak Lee +3

Although negation is known to challenge large language models (LLMs), benchmarks for evaluating negation understanding-especially in Korean-are scarce. We conduct a corpus-based an…

cs.CL2026

Polar: A Benchmark for Evaluating Political Bias in LLMs

Sangho Kim, Heejin Kim, Yoonhee Park +2

Political bias in large language models (LLMs) is increasingly significant, but difficult to measure reproducibly across political and linguistic contexts. We introduce Polar, a 4,…

cs.CL2026

Models Know Models Best: Evaluation via Model-Preferred Formats

Joonhak Lee, Sungmok Jung, Jongyeon Park +1

Performance of Large Language Models (LLMs) on multiple-choice tasks differs markedly between symbol-based and cloze-style evaluation formats. The observed discrepancies are system…

cs.CL2025

Ko-MuSR: A Multistep Soft Reasoning Benchmark for LLMs Capable of Understanding Korean

Chanwoo Park, Suyoung Park, JiA Kang +6

We present Ko-MuSR, the first benchmark to comprehensively evaluate multistep, soft reasoning in long Korean narratives while minimizing data contamination. Built following MuSR, K…

cs.CL2025

Beyond Line-Level Filtering for the Pretraining Corpora of LLMs

Chanwoo Park, Suyoung Park, Yelim Ahn +3

While traditional line-level filtering techniques, such as line-level deduplication and trailing-punctuation filters, are commonly used, these basic methods can sometimes discard v…

cs.AI2025

PUZZLED: Jailbreaking LLMs through Word-Based Puzzles

Yelim Ahn, Jaejin Lee

As large language models (LLMs) are increasingly deployed across diverse domains, ensuring their safety has become a critical concern. In response, studies on jailbreak attacks hav…