Machine Learning Algorithms & Natural Language Processing

Jun 5, 2026 · Artificial Intelligence

StepOPSD: Precise Step‑Level Error Detection for Multi‑Turn Agent RL

StepOPSD adds a post‑hoc, step‑aware distillation stage to multi‑turn agent reinforcement learning, splitting rollouts into controllable steps, using successful trajectories as hindsight teachers to compute token‑level advantage adjustments, and demonstrating significant gains on ALFWorld and Search‑QA tasks where reward misalignment is most severe.