Question 1

Can MacBook Pro M3 Pro 18GB run Qwen3.5 4B?

Accepted Answer

Yes, MacBook Pro M3 Pro 18GB can run Qwen3.5 4B with a C grade (Runs well). Expected decode speed: 40.0 tok/s.

Question 2

How much VRAM does Qwen3.5 4B need?

Accepted Answer

Qwen3.5 4B (4B parameters) requires approximately 6.4 GB of memory with Q4_K_M quantization.

Question 3

What is the best quantization for Qwen3.5 4B?

Accepted Answer

The recommended quantization for Qwen3.5 4B is Q4_K_M, which balances quality and memory efficiency.

Workload	Grade	Fit	Decode	TTFT	Context
Agentic Coding	C	Runs well	44.9 tok/s	6275 ms	61K
Chat	C	Runs well	44.9 tok/s	2353 ms	16K
Coding	C	Runs well	40.0 tok/s	4845 ms	32K
RAG	C	Runs well	44.9 tok/s	7844 ms	61K
Reasoning	C	Runs well	44.9 tok/s	5098 ms	32K

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	1.6 GB	Low	D32
Q3_K_S	3	2.0 GB	Low	D33
NVFP4	4

Can MacBook Pro M3 Pro 18GB run Qwen3.5 4B?

Memory breakdown