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Leshem Choshen

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#artificial intelligence Preprint Sep 2026

Asking for What Was Never Requested: Horizontal and Vertical Proactivity in Agents

An agent that uses tools typically responds to what the user explicitly asks, yet completing the task may require information the user never requested. Work on proactive agents mainly studies whether and when an agent should act on its own, not what information it should pursue. We study a distinct axis of proactivity:...

Ido Levy, Asaf Yehudai, Segev Shlomov et al. · 0 citations

Robustness as an Emergent Property of Task Performance

It is argued and verified that robustness, defined as consistency across semantically equivalent inputs, closely follows task difficulty: once models master a task, robustness emerges naturally.

Shir Ashury-Tahan, Ariel Gera, Elron Bandel et al. · 2 citations
Jul 2026

Automated Discovery Has No Universally Superior Harness

This work systematically decomposes OpenEvolve-style evolutionary search and the TTT-Discover search harness into its constituent components and systematically evaluates 30 budget-matched harnesses across 12 model-problem pairs using more than 3.1 million LLM rollouts and repeated-trial statistical analysis, showing th...

Akshat Gupta, Jermaine Lei, Alexander Lu et al. · 2 citations
Preprint Aug 2026

Skill Issue: Are Skills Language-Invariant in LLMs?

This work quantifies cross-lingual skill inconsistency orthogonally from knowledge and general benchmark performance via multilingual self-play, and shows that skill discrepancies are a measurable major roadblock in the development of truly multilingual models.

Bobby Cheng, Adam Gaber, Zhengzhe Liu et al. · 1 citation

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