I did a shallow check on PyTorch (that reports it is 2.9.0) - and it is different from 2.9.0 from PyTorch index - and differences are from code parts that are months before 2.9.0 was out - that is why I am assuming that Nvidia is using their fork. For cuBLAS - natively i see it is available (libcublas.so.13.1.0.3) in same version as in the container.