Author

Amritansh Mishra

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Preprint Aug 2026

Efficient Reinforcement Learning for Long-Horizon Tool-Use Agentic Tasks

SINKFLEX-RL, a modular training system for RL in dual-control tool-use environments that combines a Gymnasium-compatible environment wrapper, a VERL-style rollout dataflow, group-relative policy optimization without a separate value model, and a sink-aware FlexAttention path designed to preserve model-specific sink sca...

Zelei Cheng, Amritansh Mishra, Sambit Sahu et al. · 0 citations