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Large Language ModelsAI in HealthcarearXiv cs.AIPublished: Apr 17, 2026, 13:00 JST

Researchers propose Group Fine-Tuning (GFT) to improve language model training by addressing fundamental limitations in supervised fine-tuning and reinforcement learning approaches.

Researchers propose Group Fine-Tuning (GFT) to improve language model training by addressing fundamental limitations in supervised fine-tuning and reinforcement learning approaches.

Study reveals supervised fine-tuning (SFT) functions as a special case of policy gradient optimization with sparse rewards and unstable probability weighting, causing training instability

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