Why AUTOMATIC1111 is named like this?

Well, I can guess the "AUTOMATIC" part means that it automatically generates content for you, but what about "1111"?

I would like to know the meaning of the name, or why it came up this way.

I searched though a bunch of websites including its own official git repo, but couldn't find any information related to the name.

I will be really appreciated if the answer includes reference(s) instead of guessing.

  • 1
    The name of the program is “Stable Diffusion web UI”, as shown in the README. Is your question about the name of the author? github.com/AUTOMATIC1111 Commented Jul 31, 2023 at 16:13
  • 1
    The question is why is the software called AUTOMATIC1111; the answer is because the author's github username is AUTOMATIC1111. Commented Aug 2, 2023 at 1:26
  • @RebeccaJ.Stones : The "software" is not called AUTOMATIC1111. The name of the software is "Stable Diffusion web UI" (source the Readme.md shown below the list of first-level files and folders). Please take a look at my answer.
    – Wicket
    Commented Aug 2, 2023 at 4:14
  • 3
    I thought it was called AUTOMATIC1111, but it is clear now that it is the name of the author. I don't know if this question should be closed/deleted but I am going to leave it open for future visitors that might misunderstand it like I did and this question will make it clear to them.
    – holydragon
    Commented Aug 2, 2023 at 4:23
  • 1
    The issue may be due to the fact that some people call the software automatic1111, sometimes without mentioning stable diffusion google.com/search?q=AUTOMATIC1111 Commented Aug 2, 2023 at 10:10

2 Answers 2


TL;DR: AUTOMATIC1111 is a username, not a software name. Still, many people post on the Web using it to refer to application software or other similar stuff, and some other users use this name together with the name of the corresponding item, application software, GitHub repository, etc.

The URL of the link included in the question is https://github.com/AUTOMATIC1111/stable-diffusion-webui. This URL points to a GitHub repository.

  • github.com is the GitHub domain.

  • The part between the slashes (/) after the GithHub domain, is the username or organization name; in this case, AUTOMATIC1111 is a username.

  • The part after the second slash (/), stable-diffusion-webui, is the repository name.

  • Snapshot of Automatic1111's user profile page at GitHub Automatic1111 GitHub user profile

    Source: https://github.com/AUTOMATIC1111. Taken: August 13, 2023

  • Automatic1111 has 37 repositories on GitHub. As shown in the above image, several are related to Stable Diffusion.

For those unfamiliar with GitHub, this is one of the most famous spaces to share code using git, "a distributed version control system that tracks changes in any set of computer files, usually used for coordinating work among programmers" ref. https://en.wikipedia.org/wiki/Git.

Among other things, GitHub allows people, most of them software developers, to share their open-source software development projects publicly. One of the GitHub characteristics that make it popular among non-experienced developers and non-developers is the possibility to use it without knowing about git, thanks to it's web user interface.


There is a similar question in Reddit: Who is Automatic1111?. The current top answer points to a Discord Server and mentions that Automatic1111 is a real person who is using this as display name and user name on Discord.

level 1 KhaiNguyen·10 mo. ago
It's a real person, 1 person, you can find AUTOMATIC1111 in the Stable Diffusion official Discord under the same name. The AUTOMATIC1111 SD WebUI project is run by the same person; the project has contributions from various other developers too.


It's very simple: the program was named after the original author.

Shortly after the Stable Diffusion model was released, several similarly-named web UIs for Stable Diffusion were released. People got in the habit of calling this one AUTOMATIC1111 to distinguish it from the others, so although it may not be the name bestowed by the author, it still is a name for the software.

See the first commit in the repository.

  • 2
    +1 This is the right answer. I guess the downvotes are because it could be worded better. The author just chose AUTOMATIC1111 as their GitHub nickname, probably without thinking much. On GitHub, projects URLs automatically contain the author (or organization)'s name, and somehow "AUTOMATIC1111" is much more memorable than "stable-diffusion-webui", so I guess people got confused and the name stuck. Commented Aug 1, 2023 at 3:26
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    The commit shows that AUTOMATIC1111 created the Stable Diffusion web UI project. Saying “the program was named after the original author” in this answer is misleading. Commented Aug 2, 2023 at 10:11
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    @A.L, shortly after the Stable Diffusion model was released, there were a bunch of similarly-named web UIs for it floating around. People got in the habit of calling this one "AUTOMATIC1111" to distinguish it from the others, so although it may not be the name bestowed by the author, it still is a name for the software.
    – Mark
    Commented Aug 2, 2023 at 20:53
  • @Mark it even happened on this website, see this answer. Commented Aug 8, 2023 at 22:08

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