2018: https://ai.meta.com/blog/billion-scale-semi-supervised-learn...

>In the case of ImageNet, the current state of the art accuracy is obtained by Facebook AI’s weakly supervised ResNeXt-101-32x48 model. It delivers 85.4 percent top-1 accuracy, outperforming by a significant margin the recently published EfficientNet network. . The model is pretrained on one billion public Instagram images, which contain 1,500 ImageNet-related hashtags.