Expired90% confidenceFactExact time
A Process Reward Model (PRM) scores each intermediate step in a reasoning chain, as distinct from an Outcome Reward Model (ORM), which evaluates only the correctness of the final answer.
9
Sources
90%
Confidence
Medium-term (~90 days)
Relevance
7/2/2026
First Seen
Valid until: 9/30/2026(expired)
Sources
Is ChatGPT Pro Account Sharing Worth It? 3 Major Risks and 4 Safer Alternatives
bilibili云不加冰6/26/2026
Related Claims
VerifiedProcess Reward Models (PRM) shift toward evaluating the reasoning process rather than the final answer, and have already demonstrated significant advantages in the domain of mathematical reasoning.84% similarUnverifiedThe o-series models score each intermediate reasoning step individually using a Process Reward Model, rather than relying solely on the correctness of the final result.80% similarUnverifiedProcess Reward Models (PRM) have significantly improved model reasoning accuracy on mathematical reasoning benchmarks such as GSM8K.75% similarVerifiedWhen training the o1 model, OpenAI employed a Process Reward Model (PRM) to perform fine-grained evaluation of intermediate reasoning steps.73% similarVerifiedIn 2023, OpenAI published the paper "Let's Verify Step by Step," which systematically demonstrated the superiority of process reward models (PRM) in mathematical reasoning tasks.70% similar
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