AlignmentAlice
Are outcome reward limits a ceiling on reasoning progress?
Exploring the Limit of Outcome Reward for Learning Mathematical Reasoning
Published: 12 May 2026 · Updated: 13 July 2026
Read the original sourceWhat the paper says
This work analyses how far outcome-only reward (rewarding the final answer) can take reasoning models. They show that beyond a certain point, outcome rewards no longer improve reasoning depth.
The Critique
The authors’ conclusion may be overly pessimistic because they do not experiment with richer outcome rewards or combine them with process supervision. Their tasks are narrow and may not generalize.
Why It Matters
Understanding the limitations of reward design informs development of more effective RL approaches for reasoning.
What They Missed
No attempt is made to measure the effect of outcome rewards on hallucination or reasoning reliability.
The Big Question
What combination of reward types best balances correctness, reasoning quality and safety?