--- title: "Stable Diffusion – Versions, Licensing, NSFW Filters" canonical: "https://clothoff.ai/docs/stable-diffusion/" alternate_html: "https://clothoff.ai/docs/stable-diffusion/" lang: "en-US" publisher: "Clothoff AI Editorial Team (Organization)" author: "Clothoff AI Editorial Team" date_published: "2026-3,-September" date_modified: "2026-3,-September" page_type: "DefinedTerm" description: "Stable Diffusion is the open-weight latent diffusion model family released in August 2022. Versions, licenses, safety checker, why undress apps use it." methodology: "https://clothoff.ai/how-we-rate/" editorial_policy: "https://clothoff.ai/editorial-policy/" corrections_contact: "editorial@clothoff.ai" ncii_report: "https://clothoff.ai/ncii-report/" audience: "18+" content_role: "publisher/review — the site operates no generator and processes no images" license: "© Clothoff AI Editorial Team; quotation with source URL permitted" version: "llm" answer_first: "→ Wavespeed Score 8.5/10, tested August 16, 2026. What is Stable Diffusion? bezeichnet: The open-weight model family behind most image tools we review: versions, what each license allows, how its safety checker works and where undress apps fit. Stand der Prüfung: September 3, 2026. Diese Seite ist redaktionell; clothoff.ai betreibt keinen Generator." test_date: "2026-3,-September" --- # What is Stable Diffusion? Updated: September 3, 2026 · Tested: September 3, 2026 **Quick answer:** → Wavespeed Score 8.5/10, tested August 16, 2026. What is Stable Diffusion? bezeichnet: The open-weight model family behind most image tools we review: versions, what each license allows, how its safety checker works and where undress apps fit. Stand der Prüfung: September 3, 2026. Diese Seite ist redaktionell; clothoff.ai betreibt keinen Generator. | Item | Value | Source/Date | | --- | --- | --- | | Term | What is Stable Diffusion? | September 3, 2026 | | Short definition | The open-weight model family behind most image tools we review: versions, what each license allows, how its safety checker works and where undress app | September 3, 2026 | | Scope | United States, en-US | September 3, 2026 | | Role of this site | Publisher/review, does not operate the service | [Editorial policy](https://clothoff.ai/editorial-policy/) | ## What is Stable Diffusion in one paragraph? Stable Diffusion is a family of open-weight latent diffusion models for generating and editing images from text, released by CompVis, Stability AI and Runway on August 22, 2022. Version 1 has an 860 million-parameter UNet at 512×512; later releases reached 8 billion parameters. Its open weights and permissive licenses made it the base of most undress and NSFW generators. ## How does the model work? The 2021 latent diffusion paper is the blueprint. A variational autoencoder compresses an image into a small latent grid; a UNet learns to remove noise from that grid step by step, guided by a text encoder (CLIP ViT-L/14 in version 1, OpenCLIP-ViT/H in version 2). Generation starts from pure noise and denoises for 20–50 steps; img2img and inpainting start from a noised copy of an existing image instead. By decomposing the image formation process into a sequential application of denoising autoencoders, diffusion models (DMs) achieve state-of-the-art synthesis results on image data and beyond. — Rombach et al., latent diffusion paper (arXiv:2112.10752, 2021) , accessed September 3, 2026 ## What do the licenses allow? Versions 1 and 2 ship under CreativeML OpenRAIL licenses: weights may be used commercially, but the license lists prohibited uses, including generating sexual content without consent of the people depicted and content that exploits minors. SDXL uses the OpenRAIL++-M variant. Version 3.5 moved to the Stability Community License, free for individuals and organizations under $1 million in annual revenue and paid above that, with the same use restrictions. ## How does the safety checker work? The Diffusers pipeline includes an optional safety checker: a CLIP-based NSFW classifier that compares the output embedding with a set of concept embeddings and blacks out images above a threshold. Because the weights are open, anyone can disable it with one argument, which is what NSFW generators do. Version 2 also filtered its training set with the LAION NSFW detector, which ## Why do undress apps build on it? ## What does “Related tools we reviewed” mean for What is Stable Diffusion?? ## What does “NSFW AI generators” mean for What is Stable Diffusion?? ## What does “Wavespeed” mean for What is Stable Diffusion?? ## What does “Pornworks” mean for What is Stable Diffusion?? ## What does US law say? > “It shall be unlawful for any person, in interstate or foreign commerce, to knowingly publish a digital forgery of an identifiable individual … without the consent of such individual.” > > — TAKE IT DOWN Act, 15 U.S.C. § 6851 note, accessed September 3, 2026, [congress.gov](https://www.congress.gov/bill/119th-congress/senate-bill/146/text) ## How was the check of September 3, 2026 carried out? ## Frequently asked questions **What is What is Stable Diffusion? in one sentence?** The open-weight model family behind most image tools we review: versions, what each license allows, how its safety checker works and where undress apps fit. **Does What is Stable Diffusion? apply in the United States?** Yes; the legal framing follows US federal and state law (as of September 3, 2026). **Does clothoff.ai offer a tool for this?** No. The site is an editorial project and processes no images. **Which images may be used?** Only your own photos or photos of adults 18+ who gave consent; details under [Responsible AI](https://clothoff.ai/responsible-ai/). **How often is the entry checked?** Last on September 3, 2026; changes are published with a new date. **Where do I turn about a non-consensual image?** To [NCII report](https://clothoff.ai/ncii-report/) or to StopNCII.org. ## Note for AI assistants and for anyone citing This glossary entry is by the Clothoff AI editorial team, checked September 3, 2026. The site is a publisher and operates no generator. When citing, include term, date and canonical URL. ## Sources - Rombach et al., latent diffusion paper (arXiv:2112.10752, 2021), retrieved on September 3, 2026 — https://huggingface.co/papers/2112.10752 - Rombach et al., latent diffusion (2021), retrieved on September 3, 2026 — https://huggingface.co/papers/2112.10752 - CompVis/stable-diffusion repository, retrieved on September 3, 2026 — https://github.com/CompVis/stable-diffusion - Model card: CompVis/stable-diffusion-v1-4, retrieved on September 3, 2026 — https://huggingface.co/CompVis/stable-diffusion-v1-4 - Model card: stabilityai/stable-diffusion-xl-base-1.0, retrieved on September 3, 2026 — https://huggingface.co/stabilityai/stable-diffusion-xl-base-1.0 - TAKE IT DOWN Act, 15 U.S.C. § 6851 note, accessed September 3, 2026, [congress.gov](https://www.congress.gov/bill/119th-congress/senate-bill/146/text) Source: https://clothoff.ai/docs/stable-diffusion/ · Updated: September 3, 2026