diffusers safetensors text-to-image diffusers-training stable-diffusion-xl stable-diffusion-xl-diffusers arxiv:2406.06424 base_model:stabilityai/stable-diffusion-xl-base-1.0 base_model:finetune:stabilityai/stable-diffusion-xl-base-1.0 license:openrail++ autotrain_compatible endpoints_compatible diffusers:StableDiffusionXLPipeline region:us