Mac Studio, M4 Max, 128GB, refurbished vs Mac Studio, M5 Ultra, 256GB
Only Mac Studio, M5 Ultra, 256GB holds gpt-oss-120b at BF16. Mac Studio, M4 Max, 128GB, refurbished is 116GB short. It costs $5,090 more, and a box that cannot load the model is not a saving.
- Fit
- Won't fit
- Tight
- Headroom
- −116GB
- 12GB
- Est. speed
- —
- 58.8 tok/s
- Cheapest today
- $4,409 at Apple Certified Refurbished
- $9,499 at Apple
- Per GB of memory
- $34
- $37
- Memory
- 128GB unified memory
- 256GB unified memory
- Usable for a model
- 120GB
- 248GB
- Memory bandwidth
- 546GB/s
- 1.2TB/s
- Storage
- 1TB
- 1TB
- Lowest recorded
- $4,409 in 2d
- $9,499 in 3d
Fit, headroom and speed are computed from each vendor’s published bandwidth and the model’s own size at 8K context. Prices are the cheapest listing we could read on each seller’s page. The arithmetic is here.
Where they actually differ
- Qwen3-235B-A22BWon't fitWon't fit
- DeepSeek-V3Won't fitWon't fit
- Llama-3.3-70BWon't fitFits
- gpt-oss-120bWon't fitTight
- Mistral-Large-2411Won't fitWon't fit
- Llama-4-Scout-17B-16EWon't fitFits
- Qwen3-32BFitsFits
- Gemma-3-27BFitsFits
- gpt-oss-20bFitsFits
- Llama-4-Maverick-17B-128EWon't fitWon't fit
- Llama-4-BehemothWon't fitWon't fit
- Qwen3-Coder-480B-A35B-InstructWon't fitWon't fit
- Kimi-K2-InstructWon't fitWon't fit
- GLM-4.6Won't fitWon't fit
- DeepSeek-R1Won't fitWon't fit
- MiniMax-M2Won't fitWon't fit
- Qwen3-30B-A3BFitsFits
- Qwen3-4BFitsFits
- Devstral-Small-2507FitsFits
- Phi-4FitsFits
- Gemma-3n-E4BFitsFits
- Qwen3-VL-8B-InstructFitsFits
Every model we track at BF16. The rows where the two boxes agree are dimmed, because they are not what you are choosing between.