The gretel-trainer is an interface designed to be the simplest way to generate synthetic data, offering a preview of new features coming to Gretel's production SDK & API. It enables users to create synthetic data for datasets with millions of rows and thousands of columns without needing to set up or manage infrastructure and GPUs. The gretel-trainer uses Gretel's fully managed cloud service for model training and generation, making it easy to generate state-of-the-art synthetic data. Users can customize their synthetic models by selecting an underlying model and tuning model parameters.