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Can B200 192GB SXM run GLM-4.5-Air?

NVIDIA · 192 GB HBM3e · 8000 GB/s bandwidth · Z.ai · 110.5B (active 12B) · MoE · model ctx up to 128K

Yes — the B200 192GB SXM (192 GB HBM3e) can run GLM-4.5-Air. At Q4 with the default 8K context it needs ≈ 64.18 GB VRAM (weights 60.78 GB + KV cache 2.4 GB + 1 GB runtime overhead), which fits within 192 GB. Decode at Q4/8K: ≈ 424.2 tok/s (estimated, batch 1). FP16 needs ≈ 224.4 GB — does not fit on this card. Estimates come from memory-bandwidth math; rows tagged measured override estimates. Relative ranking is more reliable than absolute tok/s. Methodology.

Fit & speed by quant and context

QuantContextVRAM neededFits?tok/s (decode)
Q44K62.98 GBYes424.2 est.
Q48K default64.18 GBYes424.2 est.
Q432K71.38 GBYes424.2 est.
FP164K223.2 GBNo246.7 est.
FP168K default224.4 GBNo244.0 est.
FP1632K231.6 GBNo229.1 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 neededB200 192GB SXM VRAM
Q460.78 GB2.4 GB1 GB64.18 GB192 GB
FP16221.0 GB2.4 GB1 GB224.4 GB192 GB

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