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Researchers identify Matthew Effect bias in LLM reinforcement learning

Blog post released explaining Matthew Effect and Never Give Up technique

2 Sep 15 3:07 PM · 12d ago · 1 article · 2 posts · 3 sources · development 2 of 2

Michael Noukhovitch published an interactive blog post accompanying the arxiv paper, breaking down the phenomenon with eval curves from Olmo 3.1 RL-Zero Math training on AIME 2025 questions.

“The majority of our improvements are coming from the easiest problems going from somewhat solved to mostly solved. The hardest problems are barely improving.”

Michael Noukhovitch

Michael Noukhovitch Lead researcherHamish Ivison Co-authorNathan Lambert Co-authorAaron Courville Co-author

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Peak 2 pieces in 3h at Sep 15, 2 PM; 4 pieces over 13 days (2 articles · 2 posts) Sep 14, 11 PM — 1 piece · 1 article — Newswires 1Sep 15, 2 AM — quietSep 15, 5 AM — quietSep 15, 8 AM — quietSep 15, 11 AM — quietSep 15, 2 PM — 2 pieces · 1 article · 1 post — Hacker News 1, Newswires 1Sep 15, 5 PM — 1 piece · 1 post — Mastodon 1Sep 15, 8 PM — quietSep 15, 11 PM — quietSep 16, 2 AM — quietSep 16, 5 AM — quietSep 16, 8 AM — quietSep 16, 11 AM — quietSep 16, 2 PM — quietSep 16, 5 PM — quietSep 16, 8 PM — quietSep 16, 11 PM — quietSep 17, 2 AM — quietSep 17, 5 AM — quietSep 17, 8 AM — quietSep 17, 11 AM — quietSep 17, 2 PM — quietSep 17, 5 PM — quietSep 17, 8 PM — quietSep 17, 11 PM — quietSep 18, 2 AM — quietSep 18, 5 AM — quietSep 18, 8 AM — quietSep 18, 11 AM — quietSep 18, 2 PM — quietSep 18, 5 PM — quietSep 18, 8 PM — quietSep 18, 11 PM — quietSep 19, 2 AM — quietSep 19, 5 AM — quietSep 19, 8 AM — quietSep 19, 11 AM — quietSep 19, 2 PM — quietSep 19, 5 PM — quietSep 19, 8 PM — quietSep 19, 11 PM — quietSep 20, 2 AM — quietSep 20, 5 AM — quietSep 20, 8 AM — quietSep 20, 11 AM — quietSep 20, 2 PM — quietSep 20, 5 PM — quietSep 20, 8 PM — quietSep 20, 11 PM — quietSep 21, 2 AM — quietSep 21, 5 AM — quietSep 21, 8 AM — quietSep 21, 11 AM — quietSep 21, 2 PM — quietSep 21, 5 PM — quietSep 21, 8 PM — quietSep 21, 11 PM — quietSep 22, 2 AM — quietSep 22, 5 AM — quietSep 22, 8 AM — quietSep 22, 11 AM — quietSep 22, 2 PM — quietSep 22, 5 PM — quietSep 22, 8 PM — quietSep 22, 11 PM — quietSep 23, 2 AM — quietSep 23, 5 AM — quietSep 23, 8 AM — quietSep 23, 11 AM — quietSep 23, 2 PM — quietSep 23, 5 PM — quietSep 23, 8 PM — quietSep 23, 11 PM — quietSep 24, 2 AM — quietSep 24, 5 AM — quietSep 24, 8 AM — quietSep 24, 11 AM — quietSep 24, 2 PM — quietSep 24, 5 PM — quietSep 24, 8 PM — quietSep 24, 11 PM — quietSep 25, 2 AM — quietSep 25, 5 AM — quietSep 25, 8 AM — quietSep 25, 11 AM — quietSep 25, 2 PM — quietSep 25, 5 PM — quietSep 25, 8 PM — quietSep 25, 11 PM — quietYesterday, 2 AM — quietYesterday, 5 AM — quietYesterday, 8 AM — quietYesterday, 11 AM — quietYesterday, 2 PM — quietYesterday, 5 PM — quietYesterday, 8 PM — quietYesterday, 11 PM — quietToday, 2 AM — quietToday, 5 AM — quietToday, 8 AM — quietToday, 11 AM — quietToday, 2 PM — quietToday, 5 PM — quietToday, 8 PM — quiet 12
1Noukhovitch et al. publish Matthew Effect…2Blog post released explaining Matthew…
Sep 15Sep 16Sep 17Sep 18Sep 19Sep 20Sep 21Sep 22Sep 23Sep 24Sep 25yesterdaynow · 11:09 PM ET

Reported in the same hours no headline names this development itself — these 1 claim were published in its stretch

  1. 2 outlets Learning to solve hard problems in RL for LLMs by never giving up

    first by HN Frontpage, 12d ago · also arXiv cs.AI

All 2 developments of Researchers identify Matthew Effect bias in LLM… →

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