Researchers at OpenAI have introduced a modified version of the PixelCNN model, called PixelCNN++. The new model incorporates discretized logistic mixture likelihood and other improvements to enhance its performance. This modification is based on the idea that the original PixelCNN model's limitations can be addressed by using a more flexible and efficient way of modeling pixel values. According to OpenAI, the PixelCNN++ model achieves better results in image synthesis tasks compared to the original PixelCNN model. --- Why it matters: This matters because it showcases advancements in generative models for image synthesis, which are crucial for applications such as image-to-image translation and data augmentation. Source: https://openai.com/index/pixelcnn-plus-plus