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Simon Baumgartner

4 accepted papers

2025

LiPO: Listwise Preference Optimization through Learning-to-Rank

NAACL 2025long

Aligning language models (LMs) with curated human feedback is critical to control their behaviors in real-world applications. Several recent policy optimization methods, such as DPO and SLiC, serve as promising alternatives to the traditional Reinforcement Learning from Human Feedback (RLHF) approac…

Cited by 44SourcePDFScholar
2024

Multilingual Fine-Grained News Headline Hallucination Detection

EMNLP 2024finding

The popularity of automated news headline generation has surged with advancements in pre-trained language models. However, these models often suffer from the “hallucination” problem, where the generated headline is not fully supported by its source article. Efforts to address this issue have predomi…

2024

PLaD: Preference-based Large Language Model Distillation with Pseudo-Preference Pairs

ACL 2024findings

Large Language Models (LLMs) have exhibited impressive capabilities in various tasks, yet their vast parameter sizes restrict their applicability in resource-constrained settings. Knowledge distillation (KD) offers a viable solution by transferring expertise from large teacher models to compact stud…

Cited by 5SourcePDFScholar
2022

Charformer: Fast Character Transformers via Gradient-based Subword Tokenization

ICLR 2022poster

State-of-the-art models in natural language processing rely on separate rigid subword tokenization algorithms, which limit their generalization ability and adaptation to new settings. In this paper, we propose a new model inductive bias that learns a subword tokenization end-to-end as part of the mo…