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Song Han

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#machine learning Preprint Sep 2026

Delta-Matching: Closing the Final Gap of Native 8-bit Training for LLMs

Reliable FP8 attention remains a barrier to fully native 8-bit large language model training. We derive how forward-backward inconsistencies produce stale delta and empirically show how it distorts training dynamics. Our stale-delta hybrid runs show a modest loss gap at 569M parameters but substantial loss increases an...

Hao-Zhan Tang, Hao Kang, Han Cai et al. · 0 citations

Jet-Long: Efficient Long-Context Extension with Dynamic Bifocal RoPE

Jet-Long is proposed, a tuning-free zero-shot method that pairs a local RoPE-faithful window with a long-range window whose rescaling factor adapts dynamically to the current sequence length via a parameter-free analytic schedule, recovering the base model exactly at short inputs while extrapolating cleanly at long one...

Hao-Zhan Tang, Zerui Wang, Yu-Xian Gu et al. · 0 citations
#artificial intelligence Preprint Sep 2026

Lightning Weave: Improving the Accuracy-Efficiency Frontier of Reasoning Models through Capability Composition

Lightning Weave is introduced, a post-training framework that extracts and composes independently learned capabilities in a single student through on-policy distillation and achieves a state-of-the-art accuracy-efficiency frontier.

Ye-Cheng Wu, Song Han, Han Cai · 0 citations
Preprint Aug 2026

FreeToken: Efficient Edge-Native MoE Serving with Bandwidth-Adaptive Execution

Frontier open-weight models are increasingly available, but serving them still largely assumes datacenter infrastructure. We present FreeToken, an edge-native MoE serving system that treats a personal machine not as a small GPU, but as a unified, elastic inference platform. FreeToken co-designs the full serving stack,...

Shuo Yang, Xiao-yun Fan, Melissa Z. Pan et al. · 3 citations

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