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can it run

Can the Mac Studio M5 Ultra (256GB) run gpt-oss 120B MoE?

TIGHT

Yes, but close to the edge. 96GB against a 82GB working set: it runs, with little room for long context windows or other processes.

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Specs

model file65GB (GGUF Q4_K_M)
minimum memory82GB working set
this machine96GB base, config to 512GB (512GB ships late Oct)
params120B MoE
licenseapache-2.0
price$9499

Run it

model files: hugging face ↗

easy run: ollama pull gpt-oss:120b

runs with: ollama · llama.cpp · koboldcpp · lm studio

Alternatives

→ NIMO AI Mini PC (128GB) — cheapest machine that runs it ($1999)

→ ASUS ExpertCenter Pro ET900N G3 (GB300) — this model on the biggest machine

Buy

Apple ↗ · B&H Photo ↗

2026-10-01 · ← full hardware catalog · prices verified at source, may drift