Mac Studio, M5 Ultra, 96GB vs Mac Studio, M5 Ultra, 256GB
Both hold gpt-oss-120b at Q4_K_M, and Mac Studio, M5 Ultra, 256GB is not meaningfully faster — an est. 195 tok/s against 195. Buy Mac Studio, M5 Ultra, 96GB and keep the $4,000.
- Fit
- Fits
- Fits
- Headroom
- 16GB
- 176GB
- Est. speed
- 195 tok/s
- 195 tok/s
- Cheapest today
- $5,499 at Apple
- $9,499 at Apple
- Per GB of memory
- $57
- $37
- Memory
- 96GB unified memory
- 256GB unified memory
- Usable for a model
- 88GB
- 248GB
- Memory bandwidth
- 1.2TB/s
- 1.2TB/s
- Storage
- 1TB
- 1TB
- Lowest recorded
- $5,499 in 2d
- $9,499 in 2d
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 fitFits
- DeepSeek-V3Won't fitWon't fit
- Llama-3.3-70BFitsFits
- gpt-oss-120bFitsFits
- Mistral-Large-2411FitsFits
- Llama-4-Scout-17B-16EFitsFits
- Qwen3-32BFitsFits
- Gemma-3-27BFitsFits
- gpt-oss-20bFitsFits
- Llama-4-Maverick-17B-128EWon't fitTight
- Llama-4-BehemothWon't fitWon't fit
Every model we track at Q4_K_M. The rows where the two boxes agree are dimmed, because they are not what you are choosing between.