Stable Diffusion model fine-tuned with Midjourney images.
Openjourney is an open source Stable Diffusion fine tuned model on Midjourney images, created by PromptHero. The creators of PromptHero, a collection of prompts and images from various AI models such as Midjourney, Stable Diffusion, and DALL-E 2, have released their own Stable Diffusion model on Hugging Face. According to them, this model was trained with more than 60,000 images generated by Midjourney V4.
Kaynak: https://the-decoder.com/openjourney-is-stable-diffusion-trained-with-midjourney-images/ A free alternative for Midjourney.