Nai.ckpt -

: The file is part of the NovelAI image generation leak that surfaced around late 2022. It was highly sought after because it outperformed most early Stable Diffusion models in rendering detailed anime aesthetics.

While nai.ckpt was revolutionary at its release, newer models hosted on platforms like Civitai often offer better performance and safety: nai.ckpt

: The standard nai.ckpt file is approximately 4.27 GB . It is often distributed alongside a specialized VAE (Variational Autoencoder) file, which is necessary to prevent generated images from looking washed out or gray. How to Use nai.ckpt : The file is part of the NovelAI

: If you want to use it for modifying existing images, rename the file to end with inpainting.ckpt (e.g., nai-inpainting.ckpt ) so the UI recognizes its specialized function. It is often distributed alongside a specialized VAE

: Place the .ckpt file in the models/Stable-diffusion directory of your installation.