CLIP’s zero-shot performance, although comparable to supervised ResNet50, is not yet SOTA, and the authors estimate that to achieve SOTA, CLIP would need to add 1000x more computation, which is unimaginable;CLIP’s zero-shot performs poorly on certain datasets, such as fine-grained classification, abstraction tasks, etc; CLIP performs robustly on natural distribution drift, but still suffers from out-of-domain generalisation, i.e., if the distribution of the test dataset differs significantly from the training set, CLIP will perform poorly; CLIP does not address the data inefficiency challenges of deep learning, and training CLIP requires a large amount of data;