activity
20242026
most citedSCAR: Sparse Conditioned Autoencoders for Concept Detection and Steering in LLMs

1 citations · 2 across the 5 of their papers we have counts for

collaborators

6 papers

cs.CL2026

KletterMix: Climbing Toward High-Quality German Pretraining Data - The Full Report

Maurice Kraus, Ruben Härle, Sebastian Sztwiertnia +5

High-quality pretraining data is a central ingredient in modern language models, but German-language resources remain far less developed than their English counterparts: they are o…

cs.CL2026★ 1 cited

A Sovereign, Open-Source Foundation Model for German and English

Soofi-Team, :, Benedikt Droste +30

We present Soofi S 30B-A3B, a sovereign, open-source Mixture-of-Experts (MoE) hybrid Mamba Transformer foundation model for German and English. Its hybrid design activates only 3B…

cs.LG2026

LLMs Gaming Verifiers: RLVR can Lead to Reward Hacking

Lukas Helff, Quentin Delfosse, David Steinmann +6

As reinforcement Learning with Verifiable Rewards (RLVR) has become the dominant paradigm for scaling reasoning capabilities in LLMs, a new failure mode emerges: LLMs gaming verifi…

cs.LG2025

ActivationReasoning: Logical Reasoning in Latent Activation Spaces

Lukas Helff, Ruben Härle, Wolfgang Stammer +6

Large language models (LLMs) excel at generating fluent text, but their internal reasoning remains opaque and difficult to control. Sparse autoencoders (SAEs) make hidden activatio…

cs.CL2025

Measuring and Guiding Monosemanticity

Ruben Härle, Felix Friedrich, Manuel Brack +4

There is growing interest in leveraging mechanistic interpretability and controllability to better understand and influence the internal dynamics of large language models (LLMs). H…

cs.CL2024★ 1 cited

SCAR: Sparse Conditioned Autoencoders for Concept Detection and Steering in LLMs

Ruben Härle, Felix Friedrich, Manuel Brack +3

Large Language Models (LLMs) have demonstrated remarkable capabilities in generating human-like text, but their output may not be aligned with the user or even produce harmful cont…