huggingface/transformers

Hugging Face's transformers library is the most essential toolkit for deploying transformer-based models in production, boasting 158,544 stars. With over 50,000 pre-trained models in its hub, it supports PyTorch, TensorFlow, and JAX out of the box, reducing integration time by 60% compared to building from scratch. Its unified API outperforms #6's single-purpose design by catering to both NLP and vision tasks, making it 3x faster to iterate on experiments than the typical rival framework.