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license: apache-2.0
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license: apache-2.0
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# Continual Post-training method from state of the art (SOTA) LLMs for MATH.
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## Affliation
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**KRAFTON** & **SKT**
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## Summary
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In this post, we explore a new approach to enhancing the reasoning capabilities of LLMs through continual post-training. While pre-training equips LLMs with broad linguistic knowledge, it often falls short in complex reasoning tasks like math or code. Recent models have shown that Reinforcement Learning with Verifiable Rewards (RLVR) can help bridge this gap, but existing methods rely on slow and limited on-policy training. We propose an off-policy alternative using teacher-generated trajectories and introduce a novel variant of Group Relative Policy Optimization (GRPO) that better captures high-quality reasoning traces—even when all outputs are positive. Our experiments on mathematical reasoning show that this method leads to consistent improvements.
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## Results
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| Model | Method | AIME25 | AMC23 | LiveCodeBench | GPQA-Diamond | IFEval |
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|--------------------------------|--------------------------------|--------|-------|---------------|--------------|--------|
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| Openthinker3-7B | Base | 57.2915 | 92.617 | 63.968 | 50.947 | 50.09 |
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| | Off-policy GRPO (+bias) | 59.5315 | 93.516 | 64.995 | 49.684 | 51.66 |
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| Openthinker2-7B | Base | 39.792 | 88.633 | 56.115 | 45.833 | 53.3 |
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| | Off-policy GRPO (+bias) | 40.3645 | 87.656 | 55.944 | 46.843 | 52.20 |
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| AceReason-Nemetron-1.1-7B | Base | 64.635 | 92.93 | 72.383 | 52.462 | 36.02 |
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| | Off-policy GRPO (+bias) | 65.521 | 93.164 | 72.603 | 54.356 | 38.23 |
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