Stability API nodes for ComfyUI

By Stability-AIView on GitHub →

Nodes:Stability SD3, Stability Outpainting, Stability Search and Replace, Stability Image Core, Stability Inpainting, Stability Remove Background, Stability Creative Upscale. Add API key to environment variable 'SAI_API_KEY' Alternatively you can write your API key to file 'sai_platform_key.txt' You can also use and/or override the above by entering your API key in the 'api_key_override' field of each node.

How much VRAM does Stability API nodes for ComfyUI require?

Direct Answer: The ComfyUI node Stability API nodes for ComfyUI requires a minimum base VRAM of 3072MB and is optimized for GPUs with at least 8GB of VRAM. Low VRAM mode is fully supported for resource-constrained setups.

Very High (4-8GB)
Base VRAM:
3072MB (3.0GB)
Recommended GPU:
8GB+ VRAM
Low VRAM Mode:
✓ Supported
Estimation Confidence:
MEDIUM

Interactive VRAM Compatibility Estimator

Estimated Total VRAM: 3.00 GBTarget: 8 GB
✅ Comfortable Fit

Your GPU has plenty of headroom. You can run this node safely with your active configurations!

Deploy on High-Performance GPUs

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Deploy on Cloud GPUs

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Compatible Foundations

This node is verified to support or optimize workflows for the following foundation model families:

⚡ Stable Diffusion 3 (SD3)

Related Custom Nodes

The following custom nodes run in the same PyTorch / CUDA environment and share similar categories or workflows:

Bobs_Latent_Optimizer
by bobsblazed12.0GB VRAM
ComfyUI-SD3LatentSelectRes
by GavChap128MB VRAM
Comfyui_TTP_Toolset
by TTPlanetPig12.0GB VRAM
Image Oasis
by nikodemon8012.0GB VRAM
Kraken Tools
by KrakenUnbound12.0GB VRAM

Frequently Asked Questions

How much VRAM does Stability API nodes for ComfyUI require?

Stability API nodes for ComfyUI requires a minimum of 3072MB (3.0GB) of VRAM for base operation. For optimal performance, a GPU with at least 8GB of VRAM is recommended. This node supports low VRAM mode for resource-constrained setups.

Can I run Stability API nodes for ComfyUI on an RTX 3060, RTX 4070, or RTX 4090?

✅ RTX 3060 (12GB): Yes, fully compatible with 7.8GB headroom. ✅ RTX 4070 (12GB): Yes, fully compatible with 7.8GB headroom. ✅ RTX 4070 Ti (16GB): Yes, fully compatible with 11.4GB headroom. ✅ RTX 4090 (24GB): Yes, fully compatible with 18.6GB headroom

How can I reduce VRAM usage when running Stability API nodes for ComfyUI?

Stability API nodes for ComfyUI supports low VRAM mode. To reduce memory usage: (1) Enable --lowvram or --medvram flags in ComfyUI, (2) Reduce batch size to 1, (3) Use fp16 or fp8 precision if supported, (4) Close other GPU applications.

How do I install Stability API nodes for ComfyUI in ComfyUI?

To install Stability API nodes for ComfyUI: (1) Navigate to your ComfyUI/custom_nodes directory, (2) Clone the repository: git clone https://github.com/Stability-AI/ComfyUI-SAI_API, (3) Install dependencies: pip install -r requirements.txt (if present), (4) Restart ComfyUI. Alternatively, use ComfyUI Manager for one-click installation.