Can the Apple M5 Pro run gpt-oss 120B?
No. gpt-oss 120B needs about 67 GB and the Apple M5 Pro has at most 64 GB of unified memory, of which about 48 GB is usable for models. The most capable model it runs well is Qwen3 30B-A3B, at about 54 tok/s.
gpt-oss 120B needsAbout 67 GB
Apple M5 Pro has24 or 48 or 64 GB unified memory
Bandwidth307 GB/s
Estimated speedDoesn't fit
By memory size
Each Apple M5 Pro version
- 24 GB (about 16 GB usable)Too big
- 48 GB (about 36 GB usable)Too big
- 64 GB (about 48 GB usable)Too big
What runs gpt-oss 120B
These cards have the memory for it, nearest to the Apple M5 Pro first. The cheapest build on our list that runs it well is the Ryzen AI Max+ 395 mini PC, 128 GB, from $3,400 used, at about 31 tok/s.
How we estimate
Speed is roughly memory bandwidth divided by the weights read per token, calibrated on our own rack. Sizes are Ollama's default 4-bit downloads plus about 1.2 GB for context. Real results are usually within about a third. Measured it yourself? Send us the number.
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