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ProCredit: From Outcome Rewards to Progress Credit in Agentic Reinforcement Learning

arXiv · AI, language, vision and robotics · article · Sep 23, 2026 · UTC

Long-horizon agentic tasks require an agent to modify an environment through a sequence of tool calls, with success determined by the final state. The standard recipe assigns a single outcome reward at the end and compares trajectories sampled for the same task. As a result, a group with no successful trajectory yields no training signal, failed attempts cannot be told apart by how close they came to completion, and turns that advance the task receive the same credit as turns that only query the environment. Prior work refines the unit of comparison from the trajectory to the step, or trains a

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