ResearchResearch paperReinforcement Learning1 source · Oct 19, 2026

VeriCUA: Learning Proactive Verification for Reliable GUI Agent Rewards

Reinforcement learning for computer-use agents increasingly relies on proactive reward agents that interact with the post-execution GUI environment to verify what recorded screenshots cannot reveal.

Key points

  • The reliability of such verification hinges on two coupled decisions: what to check and when to stop.
  • We introduce VeriCUA, a proactive reward agent that learns its verification strategy from these single attempts.
  • Online reinforcement learning optimizes the Judge for both verdict correctness and efficient Probe use, with returns normalized across terminal states.
  • Trained only on OSWorld and evaluated without further training on MobileWorld and WebArena-Verified, VeriCUA achieves the highest reward agreement across all three benchmarks and lies on the agreement-cost Pareto frontier among proactive verifiers.

Sources (1)

  • [1]VeriCUA: Learning Proactive Verification for Reliable GUI Agent Rewards
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 19, 02:17 PM
    Reinforcement learning for computer-use agents increasingly relies on proactive reward agents that interact with the post-execution GUI environment to verify what recorded screenshots cannot reveal.
    The reliability of such verification hinges on two coupled decisions: what to check and when to stop.

Extractive summary: sentences quoted from the sources.

Before this

  1. Oct 19, 2026CUA-Lite: An Open Platform for Computer Use Agents
  2. Oct 19, 2026AI researchers stranded Claude on a virtual desert island. It started to “play.”
  3. Oct 19, 2026EmbodiedWorld-200K: Toward Embodied World Agents via Embodied-Planning Dataset and Interactive World Models
  4. Oct 19, 2026Agent World Model in the Wild: Computer-Use Agent Environment Synthesis
  5. Oct 18, 2026CoworkEnv: Synthesizing Training Environments for Long-Horizon Cowork Agents
  6. Oct 17, 2026HybridResearcher: Bridging the Structured-Unstructured Boundary for Deep Research Agents

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