Reasoning or Memorization? Unreliable Results of Reinforcement Learning Due to Data Contamination

arXiv — cs.LGThursday, December 18, 2025 at 5:00:00 AM
  • Recent research highlights that reinforcement learning (RL) methods, particularly in large language models (LLMs) like Qwen2.5, may yield unreliable results due to data contamination from pre-training on extensive web-scale datasets. This contamination affects performance evaluations on benchmarks such as MATH-500, AMC, and AIME, raising concerns about the validity of conclusions drawn from these assessments.
  • The implications of these findings are significant for the development and deployment of LLMs, as they suggest that reliance on contaminated benchmarks could misguide advancements in AI. Ensuring the integrity of evaluation metrics is crucial for fostering trust in AI systems and their applications across various domains.
  • This issue reflects a broader challenge in AI research, where the effectiveness of RL techniques is often questioned due to inconsistencies in reward signals and data quality. The emergence of new frameworks aimed at enhancing reasoning capabilities and addressing data reliability indicates a growing recognition of the need for robust evaluation methods in AI, particularly as models become increasingly complex.
— via World Pulse Now AI Editorial System

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