Why does WhisperX seem to install non-CUDA pytorch?

[FriedGenera]

When I'm using pip to install WhisperX it seems to install the cpu version of Pytorch 2.8.0 instead of the CUDA version even though I have CUDA 12.8 installed? Also is it necessary to install CUDA beforehand since the Pytorch installation usually installs it's own CUDA libraries?

[Bibblebrig]

I seem to have this happen as well. With the base install of whisperx (having already installed the CUDA 12.8 compatible version of Pytorch prior) I get the line

 ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
torchvision 0.24.1+cu128 requires torch==2.9.1, but you have torch 2.8.0 which is incompatible.

But when I attempt to reinstall the CUDA version I'm given

ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
whisperx 3.7.4 requires torch~=2.8.0, but you have torch 2.9.1+cu128 which is incompatible.
whisperx 3.7.4 requires torchaudio~=2.8.0, but you have torchaudio 2.9.1+cu128 which is incompatible.

[guslatho]

Had the same issue - downgrading to whisperx 3.7.2 seemed to fix the issue for me