PyTorch 2.15 Rollback Has Two Boundaries. Only One Is a Setting.
PyTorch 2.15 gives an operator two ways back to 2.14, and only one of them is a setting. The new NCCL backend can be switched to the legacy implementation with a backend string or an environment variable. The checkpoint format cannot be switched at all: according to the release notes, a checkpoint…
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- 2026-11-14 13:45 · DEV Community — Machine Learning
PyTorch 2.15 Rollback Has Two Boundaries. Only One Is a Setting.