Synthetic Data Generation and Data Curation Pipelines in Production: Comparing Distilabel, NVIDIA NeMo Curator, Data-Juicer, and InstructLab
As frontier language models exhaust human-authored web text, pretraining and post-training performance increasingly depends on automated data curation and synthetic data synthesis. Unfiltered public corpora introduce duplicate content, synthetic artifacts, low-reasoning text, and licensing liabilities. Modern foundation models, including Meta's Llama 3.1, NVIDIA's Nemotron-4 340B, Alibaba's Qwen 2.5, and IBM's Granite, are trained on datasets where synthetic generation and rigorous multi-stage f

