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Leshem Choshen

Weizmann Institute, EvalEval prev. MIT, IBM, Huji

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#artificial intelligence Preprint Sep 2026

Why Pretraining Fails to Share Cross-Lingual Knowledge

Large Language Models (LLMs) have made remarkable progress in the processing and modeling of many languages. Yet, unlike human multilinguals, they exhibit surprisingly limited cross-lingual knowledge transfer. While this limitation is well documented, its origins during multilingual training remain unclear. We pretrain...

Adam Gaber, Uriel Dolev, Elisabeth Fittschen et al. · 0 citations

Last Translation Benchmark

The Last Translation Benchmark is introduced, a collection of human-authored and peer-reviewed examples that break leading machine translation models and a new evaluation approach: each example comes with handcrafted verification rules describing concrete failure cases on that example, therefore allowing reliable and a...

Vilém Zouhar, Niyati Bafna, Mukund Choudhary et al. · 0 citations
#natural language process... Conference Mar 2026

Mediocrity is the key for LLM as a Judge Anchor Selection

This work systematically investigate the effect of anchor selection by evaluating 22 different anchors on the Arena-Hard-v2.0 dataset, finding that the choice of anchor is critical: a poor anchor can dramatically reduce correlation with human rankings.

Shachar Don-Yehiya, Asaf Yehudai, Leshem Choshen et al. · 6 citations · ⚡1
#natural language process... Preprint Sep 2026

User Feedback Provides a Unique Signal that LLMs Can not Detect

Harnessing naturally occurring feedback from user interactions offers a promising learning signal for Large Language Models (LLMs). However, recent studies suggest this feedback is inherently noisy and difficult to leverage effectively. We challenge this conception by demonstrating that user feedback is a highly action...

Shachar Don-Yehiya, Leshem Choshen, Omri Abend · 0 citations

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