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Marius Mosbach

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#artificial intelligence Preprint Oct 2026

Fine-Tuning a 3B-Parameter LLM on a Smartphone: Characterizing Sustained Training

Multi-billion-parameter LLMs now run on phones for inference, and training them on the device would personalize them without user data leaving the phone. Prior work has measured individual training steps of such models on phones, but not complete training runs, and not whether adapters trained on the device improve per...

Andrew Geyko, Marius Mosbach, André Brinkmann · 0 citations

LACUNA: A Testbed for Evaluating Localization Precision for LLM Unlearning

LACUNA is introduced: the first unlearning testbed with ground-truth parameter-level localization and shows that when localization is successful, even a simple gradient-based unlearning method achieves strong erasure and robustness to resurfacing attacks, highlighting the importance of precise unlearning.

Matteo Boglioni, Thibault Rousset, Siva Reddy et al. · 2 citations
Jul 2026

Evaluating Communicative Belief Updates in Large Language Models via Implicature Recognition and Cancellation

It is found that LLM belief update understanding lags behind that of humans, especially in more naturally-occurring scenarios, and the first expert-annotated implicature cancellation dataset, ImplicatureX, is created, crowdsourced for human judgements of implicatures and their corresponding cancellations.

C. Piano, Verna Dankers, Marius Mosbach et al. · 1 citation

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