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Can H100 80GB SXM5 run GLM-4.5-Air?

NVIDIA · 80 GB HBM3 · 3350 GB/s bandwidth · Z.ai · 110.5B (active 12B) · MoE · model ctx up to 128K

✅ Yes — H100 80GB SXM5 (80 GB) can run GLM-4.5-Air at Q4 (8K)
VRAM: 64.18 GB needed of 80 GB
Speed: ~177.7 tok/s (estimated)
BB · GoodComposite score: VRAM headroom × 0.5 + tok/s speed × 0.5. Q4 @ 8K context.
CUDA
Estimates from memory-bandwidth formula; rows marked "measured" override. Methodology.

Fit & speed by quant and context

QuantContextVRAM neededFits?tok/s (decode)
Q44K62.98 GBYes177.7 ± est.
Q48K default64.18 GBYes177.7 ± est.
Q432K71.38 GBYes177.7 ± est.
FP164K223.2 GBNo17.9 ± est.
FP168K default224.4 GBNo17.7 ± est.
FP1632K231.6 GBNo16.6 ± est.

Fits = weights + KV(ctx) + 1 GB overhead ≤ 95% of VRAM. Measured anchors are context-agnostic; the fit verdict is recomputed per context. A missing tok/s means the model is far beyond this card (offload-only territory).

VRAM breakdown at 8K context

QuantWeightsKV cacheOverheadTotal neededH100 80GB SXM5 VRAM
Q460.78 GB2.4 GB1 GB64.18 GB80 GB
FP16221.0 GB2.4 GB1 GB224.4 GB80 GB

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