PyTorch is a widely-used, open-source machine learning framework that offers a rich set of features for both research and production. With API access, it can be seamlessly integrated into various development environments. PyTorch is known for its dynamic computation graph, which provides flexibility during the model-building process. It supports a wide range of machine learning algorithms, including but not limited to, classification, regression, and natural language processing. The framework is highly extensible and allows for the implementation of custom layers and operations. Its robust community support and extensive documentation make it a go-to choice for researchers and developers alike.