ResearchResearch paperAgents & Tool Use · Large Language Models · Reasoning & Planning1 source · Oct 10, 2026

SkillHorizon: Constructing Long-Horizon Agent Tasks through Skill Composition

We introduce SkillHorizon, a benchmark that constructs long-horizon tasks through skill composition in seven business environments.

Key points

  • Long-horizon agents must complete workflows in which later activities depend on earlier outputs and changes to shared state.
  • Successful reference executions validate task feasibility and measure interaction workload, while programmatic evaluators assess local completion and whole-task success.
  • We evaluate five language models on 1,050 tasks with reference interaction workloads ranging from 64K to 1M tokens.
  • SkillHorizon provides a configurable testbed for studying sustained progress, dependency coordination, and complete task delivery in growing workflows.

Sources (1)

  • [1]SkillHorizon: Constructing Long-Horizon Agent Tasks through Skill Composition
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 10, 02:36 PM
    We introduce SkillHorizon, a benchmark that constructs long-horizon tasks through skill composition in seven business environments.
    Long-horizon agents must complete workflows in which later activities depend on earlier outputs and changes to shared state.

Extractive summary: sentences quoted from the sources.

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