Model Merging Scaling Laws in Large Language Models

📰 ArXiv cs.AI

Learn how to predict the effectiveness of model merging in large language models using scaling laws, crucial for optimizing AI performance

advanced Published 12 May 2026
Action Steps
  1. Identify the model size and number of experts in your large language model
  2. Apply the compact power law to predict the cross-entropy of model merging
  3. Analyze the size-dependent floor to determine the optimal model capacity
  4. Evaluate the merging tail to identify diminishing returns in the number of experts
  5. Use the scaling law to inform decisions on model merging and expert addition
Who Needs to Know This

AI engineers and researchers working on large language models can benefit from understanding model merging scaling laws to improve model performance and efficiency

Key Insight

💡 Model merging scaling laws follow a compact power law, linking model size and expert number, with diminishing returns in the number of experts

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💡 Discover the scaling laws for model merging in large language models to optimize AI performance!

Key Takeaways

Learn how to predict the effectiveness of model merging in large language models using scaling laws, crucial for optimizing AI performance

Full Article

Title: Model Merging Scaling Laws in Large Language Models

Abstract:
arXiv:2509.24244v4 Announce Type: replace Abstract: We study empirical scaling laws for language model merging measured by cross-entropy. Despite its wide practical use, merging lacks a quantitative rule that predicts returns as we add experts or scale the model size. We identify a compact power law that links model size and expert number: the size-dependent floor decreases with model capacity, while the merging tail exhibits clear diminishing returns in the number of experts. The law holds in-d
Read full paper → ← Back to Reads

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