Can I Run GPT-oss 120B on Apple M3 Max?

Written by Jakub Rusinowski · Last updated June 15, 2026

No — the GPT-oss 120B family does not fit in the Apple M3 Max's 64 GB VRAM.

Apple M3 Max Specs

VRAM	64 GB unified memory
Memory Bandwidth	400 GB/s

Why It Does Not Fit

Every GPT-oss 120B variant requires more VRAM than the Apple M3 Max provides (64 GB).

Nearest GPU That Fits

Apple M2 Max (96 GB VRAM).

FAQ

Can I run GPT-oss 120B on the Apple M3 Max?

No — the GPT-oss 120B family does not fit in the Apple M3 Max's 64 GB VRAM.

What GPU should I get instead to run GPT-oss 120B?

The Apple M2 Max (96 GB VRAM) is the cheapest upgrade that fits it.

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