Compression Scaling Laws:Unifying Sparsity and Quantization

Abstract: We investigate how different compression techniques -- such as weight and activation quantization, and weight sparsity -- affect the scaling behavior of LLMs during pretraining. Building on previous work showing that weight sparsity acts as a constant multiplier on model size in scaling laws, we demonstrate that this "effective parameter" scaling pattern extends to quantization as well. Specifically, we establish that weight-only quantization achieves strong parameter efficiency multipliers, while full quantization of both weights and activations shows diminishing returns at lower bitwidths. Our results suggest that different compression techniques can be unified under a common scaling law framework, enabling principled comparison and combination of these methods.