Can I run petitgpt on a Mac with 128 GB?

Yes

Its published weights (499 MB) fit in the 96.0 GB a Mac with 128 GB can use, with room for an unknown amount of context.

Full analysis of petitgpt Everything that runs on Mac with 128 GB Get the weights on Hugging Face

hf download yqi0/petitgpt

Files and context on Mac with 128 GB

Each file of petitgpt (and of GGUF versions the site has analyzed), and how much context fits next to it, with the context cache in 16-bit or 8-bit.

File	Size	On Mac with 128 GB	Context (16-bit)	Context (8-bit)
As published	499 MB	Fits	not known	not known
4-bit (estimate)	70.1 MB	Fits	not known	not known

petitgpt on other hardware

NVIDIA H100Yes
RTX 5090Yes
RTX 4090Yes
RTX 3090Yes
RTX 5060 Ti 16 GBYes
RTX 3060 12 GBYes
RTX 4060Yes
Mac with 32 GBYes
Mac with 64 GBYes
Mac with 128 GBYes

Popular models that run on Mac with 128 GB

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Qwen3-8BQwen · 8.19B
Qwen3-Coder-30B-A3B-Instruct-GGUFunsloth · 30.5B
gemma-4-26B-A4B-itgoogle · 25.8B
Qwen3.6-35B-A3B-FP8Qwen · 36.0B

Assumes 75% of the Mac's memory is usable (macOS's default limit for the GPU; it can be raised) and at least 4K tokens of context for one conversation, with the context cache in 16-bit unless noted. Fits leaves at least 20% of that memory for context; Tight leaves less.