ComfyUI: Node-based diffusion model interface
Visual graph-based diffusion model workflow builder.
Learn more about ComfyUI
ComfyUI is a Python-based backend and frontend application that provides a node-graph interface for building diffusion model workflows. It implements a modular architecture where individual operations (model loading, sampling, image processing) are represented as nodes that connect to form execution graphs. The system supports multiple diffusion model families including Stable Diffusion variants, SDXL, Flux, and specialized models for video and audio generation, with backend support for NVIDIA, AMD, Intel, and Apple Silicon GPUs. Workflows are constructed visually without requiring code, though the underlying system can be accessed programmatically via API.
Node-Based Workflow Construction
Each operation is a discrete, connectable node forming an execution graph. Complex pipelines are built visually without code, making workflow logic explicit, modular, and reusable across projects.
Multi-Model Family Support
Supports Stable Diffusion 1.x through Flux, SDXL, Hunyuan, plus specialized video, audio, and 3D models. Different model families can be mixed within a single workflow without compatibility barriers.
Abstracted GPU Backends
Unified interface across NVIDIA CUDA, AMD ROCm, Intel Arc, Apple Metal, and Ascend NPUs. Platform-specific optimizations are handled internally, eliminating manual backend configuration.
import requests
import json
workflow = json.load(open('workflow.json'))
response = requests.post(
'http://127.0.0.1:8188/prompt',
json={'prompt': workflow}
)
prompt_id = response.json()['prompt_id']
print(f"Queued: {prompt_id}")Fix crash on safetensors load for some 3rd party Models
- –Fix crash on safetensors load for some 3rd party Models
- –mp: Fix checkpoint saving
- –add File3DAny output to Load3D node; extend SaveGLB to accept File3DAny as input
- –Fix ace step nan issue on some hardware/pytorch configs
- –Try to fix ace text encoder slowness on some configs
Support the 4B ace step 1.5 lm model.
- –Support the 4B ace step 1.5 lm model
- –Dynamicvram: Remove Aimdo exemption for emptycache (fixes VRAM leak)
- –Fix crash with ace step 1.5
Add progress bar to ace step.
- –Add progress bar to ace step
- –Fix some issues with mac
- –llama: cast logits as a comfy-weight
- –Fix mac issue
- –feat(comfy_api): add basic 3D Model file types
See how people are using ComfyUI
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