Can Qwen 2.5 VL 72B run on Mac Studio M3 Ultra 256GB?

YES — Runs Great

S85Excellent

Estimated from fit model

Qwen 2.5 VL 72B needs ~77.4 GB VRAM. Mac Studio M3 Ultra 256GB has 184.3 GB. With Q4_K_M quantization, expect ~14 tok/s.

Runtime: llama.cppCapacity: RoomyBandwidth: HighStack: StandardBottleneck: Balanced

Operating mode

Choose the run profile you care about

Interactive favors responsiveness, while light API and scale-out lean harder on serving readiness. The fit stays the same, but the recommendation lens changes.

Current mode

Balanced

Balanced for general local use. Keeps the ranking neutral across personal and serving workflows.

Capabilities:

Select quantization to explore

Q4_K_M (Medium quality) — 77.4 GB, 13.8 tok/s, Runs well

77.4 GB required184.3 GB available

42% VRAM used

Fit status

Runs well

Decode

13.8 tok/s

TTFT

14039 ms

Safe context

33K

Memory

77.4 GB / 184.3 GB

Memory breakdown

Weights43.9 GB

KV Cache4.9 GB

Runtime0.9 GB

Headroom27.6 GB

See how fast it feels

See how fast it feelsQwen 2.5 VL 72B on Mac Studio M3 Ultra 256GB
1st promptCold start — includes initialization
>Solve: If a train travels at 60 mph for 2.5 hours, how far does it go?
Let me work through this step by step.

Given information:
  - Speed = 60 mph (miles per hour)
  - Time  = 2.5 hours

Formula: Distance = Speed x Time

Calculation:
  Distance = 60 mph x 2.5 h
           = 150 miles

The train travels 150 miles.

Double-check: at 60 mph the train covers 60 miles each hour. In half an hour it covers 30 miles. So in 2.5 hours: 60 + 60 + 30 = 150 miles. Confirmed.
2nd promptWarm — model ready, no init overhead
>What if the train stops for 20 minutes halfway?
The stop doesn't change the total distance covered while moving, but it affects total trip time.

Breakdown:
  - First half: 1.25 hours at 60 mph = 75 miles
  - Stop: 20 minutes (no distance)
  - Second half: 1.25 hours at 60 mph = 75 miles

Total distance: 150 miles (same)
Total time: 2.5 h + 0.33 h = 2.83 hours
Average speed: 150 / 2.83 = 53 mph

The distance stays the same but average speed drops to 53 mph because of the stop.
Estimated: 13.8 tok/s decode · 14.0s TTFT (warm) · 35 tok/s prefill

What limits this setup

This setup is broadly balanced for this model.

Shared-memory contention still exists

The OS, browser, and inference runtime all compete for the same physical memory pool, so real-world headroom is less forgiving than raw capacity suggests.

Best improvement path

Performance by workload

Workload	Grade	Fit	Decode	TTFT	Context
Chat	A	Runs well	13.8 tok/s	7658 ms	33K
Coding	S	Runs well	13.8 tok/s	14039 ms	33K
Agentic Coding	S	Runs well	13.8 tok/s	20421 ms	33K
Reasoning	S	Runs well	13.8 tok/s	16592 ms	33K
RAG	S	Runs well	13.8 tok/s	25526 ms	33K

Quantization options

How Qwen 2.5 VL 72B (72B params) fits at each quantization level on Mac Studio M3 Ultra 256GB (184.3 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	28.1 GB	Low	A79
Q3_K_S	3	35.3 GB	Low	A80
NVFP4	4	40.3 GB	Medium	A81
Q4_K_M	4	43.9 GB	Medium	A81
Q5_K_M	5	51.8 GB	High	A82
Q6_K	6	59.0 GB	High	A83
Q8_0	8	77.0 GB	Very High	A85
F16Best for your GPU	16	147.6 GB	Maximum	S88

Get started

Copy-paste commands to run Qwen 2.5 VL 72B on your machine.

Run

lms load Qwen2.5-VL-72B-Instruct && lms server start

Your hardware

More models your Mac Studio M3 Ultra 256GB can run

Model	Params	Grade	Decode
Devstral 2 123B Instruct	123B	S	8.1 tok/s
Qwen 3.5 122B A10B	122B	S	34.7 tok/s
DeepSeek V4 Flash	284B	S	17.8 tok/s
Mistral Small 4 119B	119B	S	37.6 tok/s
GPT-OSS 120B	117B	S	8.5 tok/s

Frequently asked questions

Can Mac Studio M3 Ultra 256GB run Qwen 2.5 VL 72B?

Yes, Mac Studio M3 Ultra 256GB can run Qwen 2.5 VL 72B with a S grade (Runs well). Expected decode speed: 13.8 tok/s.

How much VRAM does Qwen 2.5 VL 72B need?

Qwen 2.5 VL 72B (72B parameters) requires approximately 77.4 GB of memory with Q4_K_M quantization.

What is the best quantization for Qwen 2.5 VL 72B?

The recommended quantization for Qwen 2.5 VL 72B is Q4_K_M, which balances quality and memory efficiency.

What speed will Qwen 2.5 VL 72B run at on Mac Studio M3 Ultra 256GB?

On Mac Studio M3 Ultra 256GB, Qwen 2.5 VL 72B achieves approximately 13.8 tokens per second decode speed with a time-to-first-token of 14039ms using Q4_K_M quantization.

Can Mac Studio M3 Ultra 256GB run Qwen 2.5 VL 72B for coding?

For coding workloads, Qwen 2.5 VL 72B on Mac Studio M3 Ultra 256GB receives a S grade with 13.8 tok/s and 33K context.

What context window can Qwen 2.5 VL 72B use on Mac Studio M3 Ultra 256GB?

On Mac Studio M3 Ultra 256GB, Qwen 2.5 VL 72B can safely use up to 33K tokens of context. The model's official context limit is 33K, but available memory constrains the safe maximum.

Is unified memory on Mac Studio M3 Ultra 256GB as fast as VRAM for Qwen 2.5 VL 72B?

Not always. Mac Studio M3 Ultra 256GB can often fit larger models thanks to unified memory, but a discrete GPU with dedicated high-bandwidth VRAM may still decode faster once the model fits. For this combination, the important distinction is capacity versus sustained throughput.

See all results for Mac Studio M3 Ultra 256GB See all hardware for Qwen 2.5 VL 72B

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