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20242026
most citedCan Performant LLMs Be Ethical? Quantifying the Impact of Web Crawling Opt-Outs

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cs.CR2026

Fetch Me If You Can: A Comprehensive Analysis of Fetch Metadata

Pedro Bernardo, Alex Ploner, Marco Squarcina +2

Effective server-side defenses against cross-site attacks depend on understanding the context in which browser requests are generated. However, servers often lack the information n…

cs.LG2026

Improving Neural Network Training by Decoupling the Magnitude and Direction of Weight Vectors

Alexander Hägele, Alejandro Hernández-Cano, Atli Kosson +1

Modern neural network training relies on optimizers such as Adam and Muon which act on each weight matrix as a single object. Yet every weight matrix carries two distinct quantitie…

cs.CL2026

Tying the Loop -- Tied Expert Layers in Mixture-of-Experts Language Models

Martin Jaggi

Mixture-of-Experts (MoE) architectures efficiently scale Large Language Models (LLMs) by activating only a small fraction of their experts per token, yet the full parameter count -…

cs.LG2026

Apertus LLM Family Expansion via Distillation and Quantization

Andrei Panferov, Davit Melikidze, Martin Jaggi +1

The wide adoption of LLMs has led to their use in great variety of applications and scenarios, such as chatbot assistants and data annotation, creating the need for the models to s…

cs.CL2026

Toward Cross-Lingual Quality Classifiers for Multilingual Pretraining Data Selection

Yassine Turki, Vinko Sabolčec, Bettina Messmer +1

As Large Language Models (LLMs) scale, data curation has shifted from maximizing volume to optimizing the signal-to-noise ratio by performing quality filtering. However, for many l…

cs.DC2026

An Engineering Journey Training Large Language Models at Scale on Alps: The Apertus Experience

Jonathan Coles, Stefano Schuppli, Lukas Drescher +20

Large Language Models (LLMs) have surged as a transformative technology for science and society, prompting governments worldwide to pursue sovereign AI capabilities that ensure dat…