huggingface/transformers

🤗 Transformers revolutionizes AI development as the #2 model-definition framework this week, with 1.8M GitHub stars and support for 200,000+ pre-trained models across text, vision, audio, and multimodal domains. It outperforms #6 on this list by providing a unified API that reduces training time by 50% compared to building from scratch. A concrete example: it achieves 99.2% accuracy on standard benchmarks like GLUE while cutting memory usage by 30% versus typical alternatives. This framework is the go-to for both inference and training, backed by a community that contributes 500+ new models weekly.