Author

Byungoh Ko

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Preprint Aug 2026

Context Blindness in DPO: Mitigating Object Hallucination in MLLMs via Context-Calibrated Preference Optimization

Context-Calibrated DPO (C$^2$-DPO), which directly maximizes CPG while preserving the original preference ordering, is proposed, which substantially reduces hallucination without compromising general reasoning.

Byungoh Ko, Jinyoung Park, Jongha Kim et al. · 0 citations

Preprint Aug 2026

K-EXAONE 2.0 Technical Report

K-EXAONE 2.0 improves over K-EXAONE and remains competitive with open-weight models, showing its largest gains in agentic coding and long-context understanding and its clearest strengths in long-context retrieval and safety.

Eunbi Choi, Kibong Choi, Sehyun Chun et al. · 0 citations