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Does reward modeling equal reasoning?
RM-R1: Reward Modeling as Reasoning
Published: 12 May 2026 · Updated: 13 July 2026
Read the original sourceWhat the paper says
RM-R1 views the reward model itself as a reasoning agent. By jointly training the reward model and the policy, the authors claim to capture reasoning patterns implicitly.
The Critique
Equating reward modeling with reasoning conflates evaluation and generation roles. There is little evidence that the reward model develops reasoning skills rather than simple preference patterns.
Why It Matters
Understanding the role of the reward model is essential for safe RL, as mis-specified rewards can lead to harmful behaviours.
What They Missed
The paper does not consider whether the reward model inherits or amplifies biases present in human feedback.
The Big Question
Can reward models serve as trusted arbiters of reasoning quality without explicit reasoning capabilities?