ResearchResearch paperAgents & Tool Use · Reasoning & Planning2 sources · Oct 20, 2026

Evolving Agent Interfaces

We introduce Agent S4, an autonomous computer-use scientist that builds Evolving Agent Interfaces from task experience.

Key points

  • Computer-use agents are limited by the interfaces humans give them.
  • We argue that interface design should itself be an agent capability.
  • A meta-agent examines task agents' trajectories on synthetic training tasks, without success labels, and constructs and revises interfaces and usage knowledge in a repository.
  • On OSWorld V2, Agent S4, with Qwen3.8-27B and the evolved repository of interfaces, sets a new state of the art in open-source computer-use agents, reaching 21.3% binary score, 3.8 times the same model with fixed interfaces.

Sources (2)

  • [1]Evolving Agent Interfaces
    Hugging Face Daily Papers · Oct 20, 12:00 AM
    We introduce Agent S4, an autonomous computer-use scientist that builds Evolving Agent Interfaces from task experience.
    Computer-use agents are limited by the interfaces humans give them.
  • [2]Evolving Agent Interfaces
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 20, 05:47 PM · same content

Extractive summary: sentences quoted from the sources.

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