A practical, end-to-end guide for serving LLMs with vLLM on a DGX Spark (GB10 Grace Blackwell), assembled from NVIDIA’s official playbook, the vLLM team’s deep-dive, model cards, and battle-tested community setups. ⚠️Warning Flag choices on Spark are model- and image-specific, not hardware-wide defaults. The recipes below are starting points that worked for their authors against a specific container tag. Validate against the exact image you run, and pin a known-good tag/digest for anything you depend on. Copying a flag from one model’s recipe to another can silently regress throughput or output quality. ...