https://arstechnica.com/information-technology/2023/12/metas-new-ai-image-generator-was-trained-on-1-1-billion-instagram-and-facebook-photos/

On Wednesday, Meta released a free standalone AI image generator website, "Imagine with Meta AI," based on its Emu image synthesis model. Meta used 1.1 billion publicly visible Facebook and Instagram images to train the AI model, which can render a novel image from a written prompt. Previously, Meta's version of this technology—using the same data—was only available in messaging and social networking apps such as Instagram.