vLLM moves to LibTorch Stable ABI so new PyTorch releases skip vLLM rebuilds

vLLM says it has migrated to the LibTorch Stable ABI, so a new PyTorch release no longer forces a vLLM rebuild.

According to vLLM's post on X, users can upgrade PyTorch sooner, distributors need to rebuild less often, and developers can test PyTorch changes without recompiling vLLM. The migration is described in a vLLM blog post dated November 6, 2026.