Can I Run GPT-oss 120B on Apple M1 Ultra?

Written by Jakub Rusinowski · Last updated July 10, 2026

Yes — the GPT-oss 120B family runs on the Apple M1 Ultra.

Apple M1 Ultra Specs

VRAM	128 GB unified memory
Memory Bandwidth	800 GB/s

GPT-oss 120B Variants That Fit

GPT-oss 120B

Q4_K_M · 65 GB · ~12 tok/s (est.)

FAQ

Can I run GPT-oss 120B on the Apple M1 Ultra?

Yes — the GPT-oss 120B family runs on the Apple M1 Ultra.

Which GPT-oss 120B variant fits best on the Apple M1 Ultra?

GPT-oss 120B at Q4_K_M quantization (65 GB), estimated ~12 tokens/sec.

GPT-oss 120B on Other GPUs

• GPT-oss 120B on Apple M4 Max
• GPT-oss 120B on Apple M5 Max
• GPT-oss 120B on NVIDIA DGX Spark
• GPT-oss 120B on Apple M2 Max
• GPT-oss 120B on AMD Ryzen AI Max+ 395

Popular Models on the Apple M1 Ultra

• DeepSeek V4 on Apple M1 Ultra

VRAM Tier

• Best LLMs for 80 GB VRAM

Troubleshooting

• Which GGUF quant should I download? (Q4 vs Q5 vs Q8)

Buying Guide

• Best GPU Buyer Guide 2026

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