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Alexander Fraser

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#natural language process... Preprint Aug 2026

Toppling the Hierarchy in Byte-level Language Modeling

This work examines recent byte-level models and their failure to perfectly manipulate characters, finding that the hierarchical design itself limits character-level understanding, with pure byte-level models consistently outperforming hierarchical variants on character manipulation tasks.

Lukas Edman, Alexander Fraser · 0 citations
#natural language process... Preprint Aug 2026

Latent-Space Intervention for Cross-Lingual Factual Consistency: Consistency Improvements without Accuracy Drops

It is found that latent intervention improves geometric alignment between languages, and that this improvement translates into consistent gains in cross-lingual consistency with English across both open-ended and multiple-choice QA formats, without degrading factual accuracy.

Faeze Ghorbanpour, Constanza Fierro, Alexander Fraser et al. · 1 citation · ⚡1
Preprint Aug 2026

From Specialization to Generalization: Instruction-tuned LLMs for Robust Harmful Content Mitigation

By thoroughly unifying 36 English hate speech datasets spanning multiple labeling schemes, this work fine-tune a generalist LLM, based on Qwen3 (Qwen Team, 2025), specifically for hate speech mitigation, demonstrating not only state-of-the-art performance on in-domain benchmarks but also substantial improvements in cro...

Lukas Edman, Daryna Dementieva, Alexander Fraser · 0 citations

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