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Agentic Systems

7 items

RESEARCHarXiv CS.LG·4/14/2026

ExecTune: Effective Steering of Black-Box LLMs with Guide Models

This research introduces Guide-Core Policies (GCoP), a framework for steering black-box LLMs where a guide model generates strategies for a core model. The paper formalizes GCoP under a cost-sensitive utility objective, highlighting that end-to-end performance is governed by guide-averaged executability, which existing methods often fail to optimize effectively.

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RESEARCHarXiv CS.AI·4/15/2026

The Long-Horizon Task Mirage? Diagnosing Where and Why Agentic Systems Break

This research addresses the breakdown of LLM agents in long-horizon tasks, which require extended, interdependent action sequences. It introduces HORIZON, a cross-domain diagnostic benchmark designed to systematically construct tasks and analyze failure behaviors, evaluating state-of-the-art agents and proposing an LLM-as-a-Judge pipeline for scalable failure attribution.

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