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SageAttention 3 support #1491
Description
Proposal
SageAttention 3 requires Python 3.13 to install, but at the moment Stability Matrix only supports up to Python 3.12.
If there are any workaround methods to install sageattn3, please let me know.
Project page: https://github.com/thu-ml/SageAttention/tree/main/sageattention3_blackwell
Activity
mohnjiles commentedon Dec 16, 2025
Hi, you can enable "Show Unsupported Python Versions" in the Settings page, and then 3.13 should be available as an option when installing a new package.
wowgiansd-cloud commentedon Dec 17, 2025
Can anyone compile sageattn3 for python 3.13 pytorch 2.9.0cu13?
Heather95 commentedon Dec 19, 2025
Thank you! You helped me on Discord earlier, but I forgot to close this issue.
Do you have Windows or Linux? Sage Attention 3 isn't working for Windows right now.
I set up WSL on my Windows PC to launch ComfyUI and sageattn3 is working with py313 torch 2.9.1cu128. I also had to add a
memory=line to .wslconfig to ensure Comfy would use all of my system RAM.sclewis900 commentedon Feb 26, 2026
is it possible to run sage attention 2 in stability matrix at this time? I am running on arch linux with amd 7900xt