V1.1.0 of Pytorch with CUDA or the version v1.6.0 Pytorch No CUDA?

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In this web page, there are two versions, CUDA Toolkit 11.0 and CUDA Toolkit 11.0 Update1 . CUDA Toolkit Archive | NVIDIA Developer
I am confused. If I want to install Pytorch version 1.7.1 with CUDA, Which CUDA should I choose?