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Can MacBook Pro M4 Max 128GB run Solar Open 2?

Apple · 128 GB LPDDR5X · 546 GB/s bandwidth · Upstage · 250.0B (active 15.0B) · MoE · model ctx up to 1024K

❌ No — Solar Open 2 Q4 needs 138.69 GB, card only has 128 GB
VRAM: 138.69 GB needed of 128 GB
Speed: ~31.8 tok/s (estimated)
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)
Q44K138.69 GBNo31.9 ± est.
Q48K default138.88 GBNo31.8 ± est.
Q432K140.0 GBNo31.3 ± est.
FP164K501.19 GBNo—
FP168K default501.38 GBNo—
FP1632K502.5 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 Pro M4 Max 128GB VRAM
Q4137.5 GB0.38 GB0.5 GB138.88 GB128 GB
FP16500.0 GB0.38 GB0.5 GB501.38 GB128 GB

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