GLM-5.3FP8 (e4m3), official safetensors

Files, not parameter estimates

755.63 GB (display rounded to 0.01 GB)

755,632,050,320 bytes for this variant.

zai-org/GLM-5.3

Source: Hugging Face file listing. Retrieved 2026-10-21.

Hugging Face listings can change. These are dated file-size records; a revision hash was not retained. Download size does not prove that a runtime can load the model.

Fits on paper

Subtract this variant's recorded file size from each memory budget; the remainder is the upper bound for context and other overhead.

Decimal: 1 GB = 1,000,000,000 bytes; 1 TB = 1,000 GB. These are arithmetic comparison budgets, not verified usable hardware capacities. The answer can change with GB/GiB: 512 GiB = 549,755,813,888 bytes. The measured RTX 4080 has 16 GB VRAM; every other device name only labels a comparison budget.

GB values are rounded to 0.01 GB for display; “left” is what remains for context, runtime and the operating system. Exact bytes are in this model's data (JSON).

Budget minus model files leaves an upper bound for context, runtime buffers and the operating system; no context length or runtime compatibility is promised. Exactly filling a budget leaves no room for context, so the answer is “no room for context on paper”; files larger than the budget are “files too big”.

Two Mac Studio machines, 512 GB each; not delivered. Two DGX Sparks are likewise two memories, not one pool. A model split across two machines needs a compatible runtime and must fit each machine's allocation. This table is arithmetic, not a cluster test.