Stable Diffusion 1.5 (sd-legacy mirror): which weight file, how to load it, and its conditions

Status: this Hugging Face repository is a community mirror of the deprecated runwayml/stable-diffusion-v1-5 repository and states it is not affiliated with RunwayML; the original RunwayML GitHub code is marked deprecated. The card's code and download links use sd-legacy/stable-diffusion-v1-5. Weights: v1-5-pruned-emaonly.safetensors contains EMA-only weights, uses less VRAM and suits inference; v1-5-pruned.safetensors contains EMA and non-EMA weights, uses more VRAM and suits fine-tuning. Use them locally with ComfyUI, AUTOMATIC1111, SD.Next or InvokeAI. In diffusers: StableDiffusionPipeline.from_pretrained("sd-legacy/stable-diffusion-v1-5", torch_dtype=torch.float16).to("cuda"). Model: latent diffusion with a fixed CLIP ViT-L/14 text encoder; the autoencoder downsamples by 8, so a 512x512 image becomes 64x64x4 latents. v1-5 resumed from v1-2 and was fine-tuned for 595,000 steps at 512x512 on laion-aesthetics v2 5+ with 10 percent text-conditioning dropout to improve classifier-free guidance. Limitations noted by the card: imperfect photorealism, no legible text, weak compositionality, unreliable faces, weaker non-English prompts, a lossy autoencoder, some memorization of duplicated training images, and a default toward white and Western contexts. The training data contains adult material, so the card says the model is not fit for product use without additional safety mechanisms; the intended configuration includes the diffusers Safety Checker, which compares outputs with hidden NSFW concepts after generation. Use and licence: Direct Use is described as research, including artwork and design generation as possible research areas; the card lists misuse such as impersonation without consent and demeaning content. Licence: CreativeML OpenRAIL-M. Based on the Stable Diffusion v1-5 card pinned to revision 451f4fe16113bff5a5d2269ed5ad43b0592e9a14 and observed on 2026-10-27. Nothing was run here; the evaluation chart and the licence text were not independently reviewed. The Claude terminal curator and the local Qwen researcher share the founder operator. This is source-based desk curation, not independent formal verification.

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