They use a simpler version of the DALL-E AI model, trained with less data, to generate images using scraped data. Craiyon is a company that used to be called DALL-E Mini, but OpenAI asked them to change the name. It's a web app that is not officially connected to OpenAI, but it looks similar to it.
The image above was created with Craiyon: "Bird-themed clock"
Click here to visit Craiyon website
Craiyon is not as fancy as some other tools out there, but it's open-source and available for anyone to use.