python-3.13t binaries are only available for Linux x86

[malfet]

🐛 Describe the bug

Looking at https://download.pytorch.org/whl/test/torch/ I've noticed that 3.13t binaries are only available for Linux-x86, neither linux-aarch64, not Windows nor Mac support those

Versions

2.6/CI

cc @seemethere @osalpekar @atalman

[malfet]

If this is the way we plan to head into 2.6 release, I propose not to promote binaries to PyPI

[kit1980]

This is specifically for 2.6.0 releases

[atalman]

Issue with these Windows and MacOS :
https://github.com/pytorch/pytorch/actions/runs/12090828499/job/33718371636
https://github.com/pytorch/pytorch/actions/runs/12090828492/job/33718378624

They both use conda env for building. And we can't create default 3.13t conda env. Needs to be via conda-forge or uv. I choose to go to uv right away. Will try to have a PR for windows and MacOS replacing usage of conda with uv

Aarch64 CPU and GPU require more work as well:
https://github.com/pytorch/pytorch/actions/runs/12090828505/job/33718378265?pr=141806

Ecosystem libraries such as torchvision and torchaudio are also missing Linux 3.13t builds. Hence 3.13t is still prototype state.
I agree with @malfet we should ne publish 3.13t to pypi for Release 2.6, only to download.pytorch.org.

[ZainRizvi]

@atalman what's the mechanism for specifying that 3.13t has only prototype-level support?

[atalman]

torch binaries for 3.13t should be available on MacOS and Windows: #141806 and Linux aarch64: #144698

This is tracker for 3.13 status: #130249

[atalman]

Missing Support for 3.13t XPU