Can Mac mini M4 Pro 64GB run gpt-oss-120b?

Apple · 64 GB LPDDR5X · 273 GB/s bandwidth · OpenAI · 120.4B (active 5.1B) · MoE · model ctx up to 128K

No — gpt-oss-120b at Q4 needs ≈ 67.73 GB even at 4K context, beyond the Mac mini M4 Pro 64GB's 64 GB LPDDR5X. It would only run with heavy CPU/disk offload. Decode at Q4/8K: ≈ 85.6 tok/s (estimated, batch 1). FP16 needs ≈ 242.82 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

Quant	Context	VRAM needed	Fits?	tok/s (decode)
Q4	4K	67.73 GB	No	86.9 est.
Q4	8K default	68.24 GB	No	85.6 est.
Q4	32K	71.3 GB	No	78.4 est.
FP16	4K	242.31 GB	No	1.9 est.
FP16	8K default	242.82 GB	No	1.9 est.
FP16	32K	245.88 GB	No	1.8 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

Quant	Weights	KV cache	Overhead	Total needed	Mac mini M4 Pro 64GB VRAM
Q4	66.22 GB	1.02 GB	1 GB	68.24 GB	64 GB
FP16	240.8 GB	1.02 GB	1 GB	242.82 GB	64 GB

Other GPUs that run gpt-oss-120b

• B200 192GB SXM — ≈998.2 tok/s Q4 est.
• MI300X 192GB — ≈661.3 tok/s Q4 est.
• H200 141GB SXM5 — ≈598.9 tok/s Q4 est.
• H100 80GB SXM5 — ≈418.0 tok/s Q4 est.
• Gaudi 3 128GB — ≈408.8 tok/s Q4 est.
• A100 80GB SXM4 — ≈254.4 tok/s Q4 est.
• Mac Studio M3 Ultra 96GB — ≈102.2 tok/s Q4 est.
• Mac Studio M2 Ultra 192GB — ≈79.7 tok/s Q4 measured

All GPUs for gpt-oss-120b →

Other models for the Mac mini M4 Pro 64GB

• Qwen3-0.6B — ≈217.2 tok/s Q4 est.
• gemma-3-1b-it — ≈173.7 tok/s Q4 est.
• Llama-3.2-1B-Instruct — ≈144.8 tok/s Q4 est.
• Qwen3-1.7B — ≈86.9 tok/s Q4 est.
• Qwen3-30B-A3B — ≈57.9 tok/s Q4 est.
• Qwen3-Coder-30B-A3B-Instruct — ≈57.9 tok/s Q4 est.
• GLM-4.7-Flash — ≈57.9 tok/s Q4 est.
• Qwen3-30B-A3B-Instruct-2507 — ≈57.9 tok/s Q4 est.

All models on the Mac mini M4 Pro 64GB →