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18,151 papers

#artificial intelligence Preprint Open access Oct 2026

SkillHorizon: Constructing Long-Horizon Agent Tasks through Skill Composition

Long-horizon agents must complete workflows in which later activities depend on earlier outputs and changes to shared state. A key challenge for evaluation is to expand task requirements and their dependencies while keeping tasks executable and outcomes verifiable. We introduce SkillHorizon, a benchmark that constructs...

Yuxuan Liu, Zhaochen Su, Hangyu Guo et al. · 0 citations
#artificial intelligence Preprint Open access Oct 2026

AlphaRLM: Aligning Language Models for Literature-Grounded Symbolic Factor Discovery

Formulaic alpha mining seeks to discover executable expressions that capture predictive market signals in a vast, noisy search space. Recent LLM-based approaches use prompting, iterative search, or seed-factor evolution, leaving direct factor construction through policy learning less explored. To address this, we intro...

Jie Huang, Yuecheng Hong, Yao Chen et al. · 0 citations
#artificial intelligence Preprint Oct 2026

What Survives When Activation Steering Is Used as Memory

Activation steering has recently been used as a memory for skills: past experiences of an agent are stored as steering vectors and retrieved later. Facts and preferences about the user are assumed to need text instead. We test that assumption with a training-free activation memory beside a frozen LLM. The change an exp...

Vedant Jumle · 0 citations
#artificial intelligence Preprint Open access Oct 2026

MCPDisCo: Seesaw-Mitigated Tuning for MCP-Native Agents

The Model Context Protocol provides a shared interaction substrate for the agentic web, allowing heterogeneous services to expose capabilities through a standardized interface. Learning to use this ecosystem entails a hierarchy of capabilities: tool-format skills, server-level transfer, and cross-server composition. We...

Kounianhua Du, Jianxing Liu, Shuai Shao et al. · 0 citations
#artificial intelligence Preprint Oct 2026

VC-OPD: Visual Counterfactual On-Policy Distillation for Grounded Vision-Language Reasoning

GRPO-style reinforcement learning has advanced vision-language reasoning, but its sequence-level rewards provide limited credit assignment for individual reasoning tokens. On-policy distillation (OPD) addresses this issue by providing dense supervision on student-generated trajectories, yet standard OPD assigns similar...

Jia-He Feng · 0 citations
#artificial intelligence Preprint Oct 2026

Predicting how model propensities generalize out of distribution

How do language models generalize from their training data? This is a central challenge for alignment: models reliably learn their training distribution given enough samples, but we want models that behave well when deployed in new contexts. We study out-of-distribution (OOD) generalization of propensities. Our central...

J. Hunter, Li-Sheng Wen, Owen Terry et al. · 0 citations
#artificial intelligence Preprint Open access Oct 2026

SkillForgeBench: Evaluating Agent Reliability Grounded in Agent Skill Specifications

Evaluating an agent's ability to strictly satisfy diverse and procedurally complex requirements is essential to determining its practical reliability. Conducting such an evaluation demands agentic tasks that reconcile broad domain coverage with deep procedural complexity. Existing paradigms face a fundamental trade-off...

Zhengxi Li, Junyi Zhou, Qiyuan Zhang et al. · 0 citations
#artificial intelligence Preprint Open access Oct 2026

WorkBorne: Discovering Agentic Tasks from Real-World Artifact Transitions

Developing terminal-based agents for long-horizon execution demands synthetic tasks that tightly couple complex instructions with authentic, interactive environments. However, current automated synthesis suffers from a fundamental asymmetry: instruction-oriented methods fabricate low-fidelity, synthetic environments, w...

Junyi Zhou, Yufei Wang, Qiyuan Zhang et al. · 0 citations
#artificial intelligence Preprint Oct 2026

Bridging Risk Approximation Gaps in Model Predictive Task Sampling via In-Context Modeling

This work formalizes failure modes, derives lagged-risk decompositions that expose the resulting temporal bias, and recasts risk prediction as an in-context sequence modeling problem, and yields more reliable difficulty estimates and consistent performance gains across robust Meta-RL, DR, and prompt curriculum RL post-...

Jia-Rong Wen, Qing-Chao Tao, Kai-Yu Zhang et al. · 0 citations
#artificial intelligence Preprint Open access Oct 2026

Probable but Not Valid: A Psychometric Audit of Decision Models as Synthetic Survey Respondents

Language models are increasingly used to create synthetic survey samples, also called silicon samples. Decision models are a new class of language models that return a probability for each point of a rating scale instead of text. We ask whether these models, or the newest generative LLMs, can stand in for human respond...

Mantas Lukauskas, Viktorija \v{S}arkauskait\.e · 0 citations
#artificial intelligence Preprint Open access Oct 2026

MARL-BattleGrounds: A Novel JAX-native Benchmark for Heterogeneous and Competitive Multi-agent RL

We present MARL-BattleGrounds (MARL-BGs), an easy-to-use JAX-native benchmark for heterogeneous and competitive multi-agent reinforcement learning (MARL), designed to be sample-efficient, computationally efficient, and researcher-centric. MARL benchmarks are typically simple and efficient, like SMAX, where winning redu...

Ulixes Tariq Hawili, Subramanian Ramamoorthy, Yoann Altmann et al. · 0 citations
#artificial intelligence Preprint Open access Oct 2026

Beyond Outcome Feedback: Trajectory-Quality-Guided Experience-based Learning

Experience-based learning enables large language model (LLM) agents to improve over time by reusing knowledge from past executions. However, existing methods typically rely on final task outcomes as feedback for experience learning, overlooking the execution process and limiting their ability to evaluate and optimize e...

Bingjie Zhang, Yibo Yang, Qiantong Liu et al. · 0 citations

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