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PapersBuildersMulti-sourceSelected74°10:11
Agent S4 Evolves Its Own Computer-Use Interfaces

Interface design itself becomes a learnable, evolving capability, meaning smaller open models can beat frontier systems on computer-use tasks at a fraction of the cost. Builders working on agents can reuse the open-source repository and apply the evolution loop to their own workflows. The results set a concrete cost-performance benchmark against GPT-5.5 and Claude Opus 4.8 that teams choosing an agent stack can weigh directly.

Event
arXiv cs.AI@Saaket Agashe et al. (8)Source
PapersBuildersSelected10:11
R2S Fixes Myopic Teacher Scoring in Agentic On-Policy Distillation

The non-obvious insight is that the failure of agentic distillation comes from the scorer's myopia, not from students drifting out of the teacher's reliable region, so the fix targets the teacher instead of constraining rollouts. Builders training agents via distillation can adopt R2S without task reward labels, using consensus or an LLM judge as the check. Code and details are on the project page at tree-shu-zhao.github.io/r2s/.

arXiv cs.AI@Shu Zhao, Tan YuSource

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