ProRL Agent: Rollout-as-a-Service for RL Training of Multi-Turn LLM Agents
Authors: name: Hao Zhang, name: Mingjie Liu, name: Shaokun Zhang, name: Songyang Han, name: Jian Hu, name: Zhenghui Jin, name: Yuchi Zhang, name: Shizhe Diao, name: Ximing Lu, name: Binfeng Xu, name: Zhiding Yu, name: Jan Kautz, name: Yi Dong
Organization: NVIDIA

Multi-turn LLM agents are increasingly important for solving complex, interactive tasks, and reinforcement learning (RL) is a key ingredient for improving their long-horizon behavior. However, RL training requires generating large numbers of sandboxed rollout trajectories, and existing infrastructures often couple rollout orchestration with the training loop, making systems hard to migrate and maintain. Under the rollout-as-a-service philosophy, we present ProRL Agent , a scalable infrastructure that serves the full agentic rollout lifecycle through an API service. ProRL Agent also provides standardized and extensible sandbox environments that support diverse agentic tasks in rootless HPC settings. We validate ProRL Agent through RL training on software engineering, math, STEM, and coding tasks. ProRL Agent is open-sourced and integrated as part of NVIDIA NeMo Gym.