LibTorch Stable ABI
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- vLLM Migrates CUDA Builds to the LibTorch Stable ABI
vLLM says its CUDA build now uses PyTorch’s LibTorch Stable ABI, allowing compatible LibTorch updates to be imported without rebuilding or updating vLLM. Starting with v0.33.0, the project publishes LibTorch ABI Stable CUDA wheels and uses torch-abi-audit in CI to check for unstable symbols. The Stable ABI does not guarantee compatibility across all PyTorch releases because Python APIs, GPU and CUDA requirements, and third-party dependencies remain relevant.
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