Model Zoos: A Dataset of Diverse Populations of Neural Network Models

TL;DR

This paper introduces a comprehensive dataset of neural network model zoos, capturing diverse populations of models trained on various datasets, enabling new research avenues in model analysis, dynamics, and generative modeling.

Contribution

It provides the first large-scale, systematically generated dataset of neural network populations, including detailed analysis and benchmarks for downstream tasks.

Findings

The dataset contains over 3.8 million model states.

Analysis reveals structural properties of model populations.

Benchmarks demonstrate utility for various tasks.

Abstract

In the last years, neural networks (NN) have evolved from laboratory environments to the state-of-the-art for many real-world problems. It was shown that NN models (i.e., their weights and biases) evolve on unique trajectories in weight space during training. Following, a population of such neural network models (referred to as model zoo) would form structures in weight space. We think that the geometry, curvature and smoothness of these structures contain information about the state of training and can reveal latent properties of individual models. With such model zoos, one could investigate novel approaches for (i) model analysis, (ii) discover unknown learning dynamics, (iii) learn rich representations of such populations, or (iv) exploit the model zoos for generative modelling of NN weights and biases. Unfortunately, the lack of standardized model zoos and available benchmarks significantly increases the friction for further research about populations of NNs. With this work, we publish a novel dataset of model zoos containing systematically generated and diverse populations of NN models for further research. In total the proposed model zoo dataset is based on eight image datasets, consists of 27 model zoos trained with varying hyperparameter combinations and includes 50'360 unique NN models as well as their sparsified twins, resulting in over 3'844'360 collected model states. Additionally, to the model zoo data we provide an in-depth analysis of the zoos and provide benchmarks for multiple downstream tasks. The dataset can be found at www.modelzoos.cc.