ZLUDA implements CUDA on top of AMD ROCm - they are explicitly targetting vLLM as their PyTorch compatibility test: https://vosen.github.io/ZLUDA/blog/zluda-update-q4-2025/#pyt...
(PyTorch does also support ROCm generally, it shows up as a CUDA device.)
I feel like these technologies are named by the Polish at the companies. "CUDA" means "WONDERS" and "ZŁUDA" would be an "ILLUSION".