ComfyUI and Automatic1111 are the two best-known interfaces for Stable Diffusion. In 2026 ComfyUI has become the default for new models like FLUX and video generation, while Automatic1111 (and its faster fork Forge) remains popular for its simple form-based UI. Which should you use?
Table of Contents
Quick Comparison
| ComfyUI | Automatic1111 / Forge | |
|---|---|---|
| Interface | Node-based workflows | Tabs and forms |
| Learning curve | Steeper | Easier |
| New model support (FLUX.2, video) | Fastest, often day one | Slower; Forge adds some |
| Performance / VRAM use | Very efficient | Good (Forge better than A1111) |
| Extensions | Custom nodes via Manager | Large extension library |
| Development | Very active | A1111 slow; Forge forks active |
| Best for | Advanced and production workflows | Beginners and quick edits |
Ease of Use
Automatic1111 is easier on day one: type a prompt, press Generate. ComfyUI shows the full pipeline as nodes, which is more to learn but far more flexible, and its built-in templates now make starting much easier.
Performance
ComfyUI only re-runs the parts of a workflow that changed and manages VRAM smartly, so it is usually faster and runs bigger models on smaller GPUs. Forge closes much of the gap for Automatic1111 users.
Model Support
New open models such as FLUX.2, SD 3.5 and video models (Wan, HunyuanVideo) typically land in ComfyUI first. If you want the latest AI models, ComfyUI is the safer choice.
Which Should You Choose?
- Beginner, SD 1.5/SDXL, inpainting: Forge or Automatic1111.
- FLUX, video, complex pipelines, APIs: ComfyUI.
- Both: share one models folder between them.
Run Either on a Cloud GPU
No powerful GPU at home? You can run ComfyUI or Automatic1111 on a rented GPU server instead. RunPod has templates for both, on an RTX 4090 at $0.34/hour. For a fixed monthly price, GPU Mart (RTX A4000 VPS from $119/month, RTX 4090 $409/month) and HOSTKEY (RTX 4090 from €279/month) offer dedicated servers you can keep running 24/7.
FAQ
For new models, performance and complex workflows, yes. For simplicity, Automatic1111 or Forge.
Yes. Point both to the same model folders to save disk space.
Updates to the original Automatic1111 have been infrequent; Forge and other forks are more active.
Conclusion
In 2026, ComfyUI is the best choice for most users who want the latest AI image and video models; Automatic1111/Forge remains a friendly option for simple image generation.