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Kristian Kersting

4 papers indexed

arxivcs.CLcs.AIcs.LG2026-07-10

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

Soofi-Team, :, Benedikt Droste, David Fitzek, Ruben Härle, Lukas Helff, et al.

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 of 30B parameters per token and keeps the inference cache near-constant as context grows, giving it…

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arxivcs.AIcs.CV2026-07-09

Playing ZendoWorld: Challenging AI Agents on Active Visual Concept Induction

Sophia Koehler, Antonia Wüst, Inga Ibs, Wasu Top Piriyakulkij, Wolfgang Stammer, Constantin Rothkopf, et al.

A central challenge in building intelligent systems is enabling agents to jointly perceive complex inputs, form hypotheses about hidden patterns, and design informative experiments to test them. To study this problem, we propose ZendoWorld, a controlled interactive environment in…

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arxivcs.MAcs.AI2026-07-02

CausalSteward: An Agentic Divide-Conquer-Combine Copilot for Causal Discovery

Nicholas Tagliapietra, Gian Lorenzo Marchioni, Moritz Willig, Juergen Luettin, Lavdim Halilaj, Kristian Kersting

Learning causal models from high-dimensional data is a significant challenge, particularly in real-world settings where violations of core assumptions lead to causal identifiability issues. Although massive amounts of prior knowledge are available, and contain valuable causal inf…

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arxivcs.LG2026-06-26

COCOLogic-V2: Identifying Logical Inconsistencies via Truly Hard-Negatives

David Steinmann, Antonia Wüst, Kristian Kersting, Wolfgang Stammer

While interpretable models such as concept bottleneck models (CBMs) and program synthesis methods enable verification of model decisions, their evaluation is typically limited to simple tasks, leaving complex reasoning on real-world images largely unexplored. We introduce COCOLog…

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