I am also seeing this issue:
C:\Users\name>python --version
Python 3.7.3
C:\Users\name>pip3 install torch torchvision torchaudio --index-url https://download.pytorch.org/whl/cu118
Looking in indexes: https://download.pytorch.org/whl/cu118
Collecting torch
Could not find a version that satisfies the requirement torch (from versions: )
No matching distribution found for torch
This is on Windows 10. I had just installed a fresh CUDA toolkit v 11.8