The [PolyCoder paper](https://arxiv.org/pdf/2202.13169v3.pdf) gives a nice comparison of existing code models. The authors also trained a code generation model on **249GB** of data, after preprocessing, consisting of popular repositories for 12 popular programming languages with at least 50 stars from GitHub in October 2021. The data used the following preprocessing: - Exact match deduplication - Filtering: - Average line length < 100 tokens - Maximum line length < 1000 MB