FLUX by Black Forest Labs

Black Forest Labs was founded by several of the original creators of Stable Diffusion. Its FLUX models quickly earned a reputation for detailed, realistic images that follow prompts closely, including hands and text that earlier models often got wrong. Some versions have open weights you can run yourself, while the strongest ones are offered through an API and through many partner apps. There are also models for editing an image with instructions. Pricing is per image through the API, and open models are free under their licenses. It is a top choice for people who want the best quality from a model they can build on.