Release

PyTorch 2.13.0 released with FlexAttention on Apple Silicon and the torchcomms backend

Event: Jul 8, 2026 · Published: Oct 13, 2026

PyTorch 2.13.0 was published on GitHub on July 8, 2026. The release notes highlight FlexAttention support on Apple Silicon (MPS) and a deterministic FlexAttention backward path on CUDA, a prototype CuTeDSL "Native DSL" backend for Inductor alongside Triton, and nn.LinearCrossEntropyLoss, which combines the final prediction and loss computation to reduce peak GPU memory. They also introduce torchcomms, a new communications backend for PyTorch Distributed, and Python 3.15 wheels on Linux, while dropping free-threaded CPython 3.13t binaries and Bazel build support. USASI has not tested this release.1

Sources

1.
PyTorch 2.13.0 Release Notes (GitHub) (external site: github.com)
PyTorch · Release notes · published Jul 8, 2026 · accessed Oct 13, 2026

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USASI. (2026, October 13). PyTorch 2.13.0 released with FlexAttention on Apple Silicon and the torchcomms backend. United States of America Superintelligence. https://unitedstatesofamericasuperintelligence.com/news/pytorch-2-13-0-released/

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@misc{usasi_news_pytorch_2_13_0_released,
  author = {{USASI}},
  title = {PyTorch 2.13.0 released with FlexAttention on Apple Silicon and the torchcomms backend},
  year = {2026},
  month = oct,
  howpublished = {\url{https://unitedstatesofamericasuperintelligence.com/news/pytorch-2-13-0-released/}},
  note = {United States of America Superintelligence. Last updated 2026-10-13}
}

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