ComfyUI-SageAttention3

An experimental node

Strict Sage 3 (Blackwell) attention for ComfyUI official flows.

• Hot-patches torch.nn.functional.scaled_dot_product_attention to sageattn3.api.sageattn3_blackwell
• Prints which backend is active (toggleable)

Install

1. Copy ComfyUI-SageAttention3 into ComfyUI/custom_nodes/
2. Install: pip install sageattn3
3. install from repo - https://github.com/thu-ml/SageAttention/tree/main/sageattention3_blackwell

Use

Add Attention: Sage 3 (Blackwell) before samplers, pass MODEL through, set enable=True.