Offically Supported TensorFlow 2.1 Models on Cloud TPU Natural Language Processing bert: A powerful pre-trained language representation model: BERT, which stands for Bidirectional Encoder Representations from Transformers. transformer: A transformer model to translate the WMT English to German dataset. Computer Vision mnist: A basic model to classify digits from the MNIST dataset. resnet: A deep residual network that can be used to classify ImageNet's dataset of 1000 classes. retinanet: A fast and powerful object detector.