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Can MacBook Neo A18 Pro 8GB run gpt-oss-120b?

Apple · 8 GB LPDDR5X · 60 GB/s bandwidth · OpenAI · 120.4B (active 5.1B) · MoE · model ctx up to 128K

❌ No — gpt-oss-120b Q4 needs 68.56 GB, card only has 8 GB
VRAM: 68.56 GB needed of 8 GB
FF · No FitComposite score: VRAM headroom × 0.5 + tok/s speed × 0.5. Q4 @ 8K context.
METAL
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Estimates from memory-bandwidth formula; rows marked "measured" override. Methodology.

Fit & speed by quant and context

QuantContextVRAM neededFits?tok/s (decode)
Q44K68.56 GBNo
Q48K default68.71 GBNo
Q432K69.55 GBNo
FP164K241.94 GBNo
FP168K default242.08 GBNo
FP1632K242.93 GBNo

Fits = weights + KV(ctx) + 0.5 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 neededMacBook Neo A18 Pro 8GB VRAM
Q467.42 GB0.28 GB0.5 GB68.71 GB8 GB
FP16240.8 GB0.28 GB0.5 GB242.08 GB8 GB

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