both autoregressive and diffusion models for the prior, finding that the latter are computationally more efficient and produce higher-quality samples.  Tips Stable unCLIP takes  noise_level as input during inference which determines how much noise is added to the image embeddings. A higher noise_level increases variation in the final un-noised images. By default, we do not add any additional noise to the image embeddings (noise_level = 0).  Tex