SD.Next: Advanced Implementation of Stable Diffusion and other Diffusion-based generative image models




Stable Diffusion implementation with advanced features

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Notable features

All individual features are not listed here, instead check ChangeLog for full list of changes

  • Multiple backends!
    Diffusers | Original
  • Multiple diffusion models!
    Stable Diffusion 1.5/2.1 | SD-XL | LCM | Segmind | Kandinsky | Pixart-α | Stable Cascade | Würstchen | aMUSEd | DeepFloyd IF | UniDiffusion | SD-Distilled | BLiP Diffusion | KOALA | etc.
  • Built-in Control for Text, Image, Batch and video processing!
    ControlNet | ControlNet XS | Control LLLite | T2I Adapters | IP Adapters
  • Multiplatform!
    Windows | Linux | MacOS with CPU | nVidia | AMD | IntelArc | DirectML | OpenVINO | ONNX+Olive | ZLUDA
  • Platform specific autodetection and tuning performed on install
  • Optimized processing with latest torch developments with built-in support for torch.compile
    and multiple compile backends: Triton, ZLUDA, StableFast, DeepCache, OpenVINO, NNCF, IPEX
  • Improved prompt parser
  • Enhanced Lora/LoCon/Lyco code supporting latest trends in training
  • Built-in queue management
  • Enterprise level logging and hardened API
  • Built in installer with automatic updates and dependency management
  • Modernized UI with theme support and number of built-in themes (dark and light)

Main text2image interface:

For screenshots and informations on other available themes, see Themes Wiki

Backend support

SD.Next supports two main backends: Diffusers and Original:

  • Diffusers: Based on new Huggingface Diffusers implementation
    Supports all models listed below
    This backend is set as default for new installations
    See wiki article for more information
  • Original: Based on LDM reference implementation and significantly expanded on by A1111
    This backend and is fully compatible with most existing functionality and extensions written for A1111 SDWebUI
    Supports SD 1.x and SD 2.x models
    All other model types such as SD-XL, LCM, PixArt, Segmind, Kandinsky, etc. require backend Diffusers

Model support

Additional models will be added as they become available and there is public interest in them

Also supported are modifiers such as:

  • LCM and Turbo (adversarial diffusion distillation) networks
  • All LoRA types such as LoCon, LyCORIS, HADA, IA3, Lokr, OFT
  • IP-Adapters for SD 1.5 and SD-XL
  • InstantID, FaceSwap, FaceID, PhotoMerge
  • AnimateDiff for SD 1.5


IP Adapters: Screenshot-IPAdapter

Color grading:



  • Loading any model other than standard SD 1.x / SD 2.x requires use of backend Diffusers
  • Loading any other models using Original backend is not supported
  • Loading manually download model .safetensors files is supported for specified models only (typically SD 1.x / SD 2.x / SD-XL models only)
  • For all other model types, use backend Diffusers and use built in Model downloader or
    select model from Networks -> Models -> Reference list in which case it will be auto-downloaded and loaded

Platform support

  • nVidia GPUs using CUDA libraries on both Windows and Linux
  • AMD GPUs using ROCm libraries on Linux
    Support will be extended to Windows once AMD releases ROCm for Windows
  • Intel Arc GPUs using OneAPI with IPEX XPU libraries on both Windows and Linux
  • Any GPU compatible with DirectX on Windows using DirectML libraries
    This includes support for AMD GPUs that are not supported by native ROCm libraries
  • Any GPU or device compatible with OpenVINO libraries on both Windows and Linux
  • Apple M1/M2 on OSX using built-in support in Torch with MPS optimizations
  • ONNX/Olive



  • Server can run with or without virtual environment,
    Recommended to use VENV to avoid library version conflicts with other applications
  • nVidia/CUDA / AMD/ROCm / Intel/OneAPI are auto-detected if present and available,
    For any other use case such as DirectML, ONNX/Olive, OpenVINO specify required parameter explicitly
    or wrong packages may be installed as installer will assume CPU-only environment
  • Full startup sequence is logged in sdnext.log,
    so if you encounter any issues, please check it first


Once SD.Next is installed, simply run webui.ps1 or webui.bat (Windows) or (Linux or MacOS)

List of available parameters, run webui --help for the full & up-to-date list:

Server options:
  --config CONFIG                                    Use specific server configuration file, default: config.json
  --ui-config UI_CONFIG                              Use specific UI configuration file, default: ui-config.json
  --medvram                                          Split model stages and keep only active part in VRAM, default: False
  --lowvram                                          Split model components and keep only active part in VRAM, default: False
  --ckpt CKPT                                        Path to model checkpoint to load immediately, default: None
  --vae VAE                                          Path to VAE checkpoint to load immediately, default: None
  --data-dir DATA_DIR                                Base path where all user data is stored, default:
  --models-dir MODELS_DIR                            Base path where all models are stored, default: models
  --allow-code                                       Allow custom script execution, default: False
  --share                                            Enable UI accessible through Gradio site, default: False
  --insecure                                         Enable extensions tab regardless of other options, default: False
  --use-cpu USE_CPU [USE_CPU ...]                    Force use CPU for specified modules, default: []
  --listen                                           Launch web server using public IP address, default: False
  --port PORT                                        Launch web server with given server port, default: 7860
  --freeze                                           Disable editing settings
  --auth AUTH                                        Set access authentication like "user:pwd,user:pwd""
  --auth-file AUTH_FILE                              Set access authentication using file, default: None
  --autolaunch                                       Open the UI URL in the system's default browser upon launch
  --docs                                             Mount API docs, default: False
  --api-only                                         Run in API only mode without starting UI
  --api-log                                          Enable logging of all API requests, default: False
  --device-id DEVICE_ID                              Select the default CUDA device to use, default: None
  --cors-origins CORS_ORIGINS                        Allowed CORS origins as comma-separated list, default: None
  --cors-regex CORS_REGEX                            Allowed CORS origins as regular expression, default: None
  --tls-keyfile TLS_KEYFILE                          Enable TLS and specify key file, default: None
  --tls-certfile TLS_CERTFILE                        Enable TLS and specify cert file, default: None
  --tls-selfsign                                     Enable TLS with self-signed certificates, default: False
  --server-name SERVER_NAME                          Sets hostname of server, default: None
  --no-hashing                                       Disable hashing of checkpoints, default: False
  --no-metadata                                      Disable reading of metadata from models, default: False
  --disable-queue                                    Disable queues, default: False
  --subpath SUBPATH                                  Customize the URL subpath for usage with reverse proxy
  --backend {original,diffusers}                     force model pipeline type
  --allowed-paths ALLOWED_PATHS [ALLOWED_PATHS ...]  add additional paths to paths allowed for web access

Setup options:
  --reset                                            Reset main repository to latest version, default: False
  --upgrade                                          Upgrade main repository to latest version, default: False
  --requirements                                     Force re-check of requirements, default: False
  --quick                                            Bypass version checks, default: False
  --use-directml                                     Use DirectML if no compatible GPU is detected, default: False
  --use-openvino                                     Use Intel OpenVINO backend, default: False
  --use-ipex                                         Force use Intel OneAPI XPU backend, default: False
  --use-cuda                                         Force use nVidia CUDA backend, default: False
  --use-rocm                                         Force use AMD ROCm backend, default: False
  --use-zluda                                        Force use ZLUDA, AMD GPUs only, default: False
  --use-xformers                                     Force use xFormers cross-optimization, default: False
  --skip-requirements                                Skips checking and installing requirements, default: False
  --skip-extensions                                  Skips running individual extension installers, default: False
  --skip-git                                         Skips running all GIT operations, default: False
  --skip-torch                                       Skips running Torch checks, default: False
  --skip-all                                         Skips running all checks, default: False
  --skip-env                                         Skips setting of env variables during startup, default: False
  --experimental                                     Allow unsupported versions of libraries, default: False
  --reinstall                                        Force reinstallation of all requirements, default: False
  --test                                             Run test only and exit
  --version                                          Print version information
  --ignore                                           Ignore any errors and attempt to continue
  --safe                                             Run in safe mode with no user extensions

Logging options:
  --log LOG                                          Set log file, default: None
  --debug                                            Run installer with debug logging, default: False
  --profile                                          Run profiler, default: False



SD.Next comes with built-in control for all types of text2image, image2image, video2video and batch processing

Control interface:

Control processors:

Masking: Screenshot-Mask


SD.Next comes with several extensions pre-installed:


  • We'd love to have additional maintainers (with comes with full repo rights). If you're interested, ping us!
  • In addition to general cross-platform code, desire is to have a lead for each of the main platforms
    This should be fully cross-platform, but we'd really love to have additional contributors and/or maintainers to join and help lead the efforts on different platforms





If you're unsure how to use a feature, best place to start is Wiki and if its not there,
check ChangeLog for when feature was first introduced as it will always have a short note on how to use it


TillerzAllan GrantBrent OzarMatthew RunoSalad Technologiesa.v.mantzaris