Author

Aiyuan Zhang

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Preprint Jul 2026

Rethinking Heterogeneous LLM Merging: A Weighted Model Averaging Perspective

The results show that simple parameter averaging, when paired with lightweight dimensional adaptation and carefully controlled ratios, is a surprisingly strong baseline for heterogeneous LLM merging, suggesting that the limits of direct weighted fusion may also bound what more complex heterogeneous merging methods can...

Jiahe Fan, Yinghao Hou, Sixiang Chen et al. · 0 citations

Preprint Jul 2026

Training-Free Knowledge Transfer Across Model Scales through Activation-Guided Pruning

Evidence is provided that cross-scale heterogeneous fusion can succeed without explicit semantic alignment when the donor contribution is sufficiently concentrated and carefully selected, and that activation-guided extraction improves the quality of the transferable donor slice while preserving the small-ratio fusion r...

Jiahe Fan, Si Chen, Yinghao Hou et al. · 0 citations