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Mac Studio M1 Ultra (64-core GPU) 128GB

GPU(s)Apple M1 Ultra 64-core GPU (unified)
VRAM / unified memory (GB)128
CPUApple M1 Ultra
Motherboard
RAM
PSU
Other
Reported total cost
Power

Measured speed (generation tokens/sec)

ModelQuantEnginetok/s
gpt-oss 20Bllama.cpp100.43
DeepSeek R1 Distill 14Bllama.cpp41.51
Llama 3.1 70Bllama.cpp9.84
Llama 3.2 3Bllama.cpp127.6

Numbers from Jeff Geerling's ai-benchmarks results table (llama.cpp/Ollama eval rate). Quantization not stated in the summary table. Power is peak whole-system draw during that test.

Source: https://github.com/geerlingguy/ai-benchmarks/issues/48
https://github.com/geerlingguy/ai-benchmarks

Blank fields = not stated in the source. We never estimate build data; GPU street prices above are separately sourced and dated.

Rent before you buy: try this model on a cloud GPU for a few dollars first: RunPod

Quick answers: Can Apple M1 Ultra run gpt-oss 20B?