Can Qwen 2.5 32B run on Mac Studio M1 Ultra 128GB?

YES — Runs Great

A80Great

Estimated from fit model

Qwen 2.5 32B needs ~38.2 GB VRAM. Mac Studio M1 Ultra 128GB has 92.2 GB. With Q4_K_M quantization, expect ~24 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) — 38.2 GB, 24.3 tok/s, Runs well

38.2 GB required92.2 GB available

41% VRAM used

Fit status

Runs well

Decode

24.3 tok/s

TTFT

7953 ms

Safe context

131K

Memory

38.2 GB / 92.2 GB

Memory breakdown

Weights19.5 GB

KV Cache3.9 GB

Runtime0.9 GB

Headroom13.8 GB

See how fast it feels

See how fast it feelsQwen 2.5 32B on Mac Studio M1 Ultra 128GB
1st promptCold start — includes initialization
>Write a Python function to sort a list
Here's a Python function that sorts a list using quicksort:

def quicksort(arr):
    if len(arr) <= 1:
        return arr
    pivot = arr[len(arr) // 2]
    left   = [x for x in arr if x < pivot]
    middle = [x for x in arr if x == pivot]
    right  = [x for x in arr if x > pivot]
    return quicksort(left) + middle + quicksort(right)

# Example usage
numbers = [3, 6, 8, 10, 1, 2, 1]
print(quicksort(numbers))  # [1, 1, 2, 3, 6, 8, 10]

The algorithm picks a pivot, partitions the list into smaller, equal, and larger elements, then recursively sorts each partition and concatenates the results.
2nd promptWarm — model ready, no init overhead
>Now add type hints and a docstring
def quicksort(arr: list[int]) -> list[int]:
    """Sort a list using the quicksort algorithm.

    Args:
        arr: List of integers to sort.

    Returns:
        A new sorted list.
    """
    if len(arr) <= 1:
        return arr
    pivot = arr[len(arr) // 2]
    left   = [x for x in arr if x < pivot]
    middle = [x for x in arr if x == pivot]
    right  = [x for x in arr if x > pivot]
    return quicksort(left) + middle + quicksort(right)

Added type hints for the input and return type, plus a Google-style docstring.
Estimated: 24.3 tok/s decode · 8.0s TTFT (warm) · 61 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	24.3 tok/s	4338 ms	131K
Coding	A	Runs well	24.3 tok/s	7953 ms	131K
Agentic Coding	A	Runs well	24.3 tok/s	11567 ms	131K
Reasoning	A	Runs well	24.3 tok/s	9399 ms	131K
RAG	A	Runs well	24.3 tok/s	14459 ms	131K

Quantization options

How Qwen 2.5 32B (32B params) fits at each quantization level on Mac Studio M1 Ultra 128GB (92.2 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	12.5 GB	Low	A73
Q3_K_S	3	15.7 GB	Low	A74
NVFP4	4	17.9 GB	Medium	A74
Q4_K_M	4	19.5 GB	Medium	A74
Q5_K_M	5	23.0 GB	High	A75
Q6_K	6	26.2 GB	High	A75
Q8_0	8	34.2 GB	Very High	A77
F16Best for your GPU	16	65.6 GB	Maximum	A81

Get started

Copy-paste commands to run Qwen 2.5 32B on your machine.

Run

ollama run qwen2.5

Your hardware

More models your Mac Studio M1 Ultra 128GB can run

Model	Params	Grade	Decode
Devstral 2 123B Instruct	123B	S	6 tok/s
Qwen 3.5 122B A10B	122B	S	27.4 tok/s
Qwen 3.6 35B A3B	35B	S	55.9 tok/s
Qwen 3.5 35B A3B	35B	S	60.8 tok/s
Mistral Small 4 119B	119B	S	29.3 tok/s

Frequently asked questions

Can Mac Studio M1 Ultra 128GB run Qwen 2.5 32B?

Yes, Mac Studio M1 Ultra 128GB can run Qwen 2.5 32B with a A grade (Runs well). Expected decode speed: 24.3 tok/s.

How much VRAM does Qwen 2.5 32B need?

Qwen 2.5 32B (32B parameters) requires approximately 38.2 GB of memory with Q4_K_M quantization.

What is the best quantization for Qwen 2.5 32B?

The recommended quantization for Qwen 2.5 32B is Q4_K_M, which balances quality and memory efficiency.

What speed will Qwen 2.5 32B run at on Mac Studio M1 Ultra 128GB?

On Mac Studio M1 Ultra 128GB, Qwen 2.5 32B achieves approximately 24.3 tokens per second decode speed with a time-to-first-token of 7953ms using Q4_K_M quantization.

Can Mac Studio M1 Ultra 128GB run Qwen 2.5 32B for coding?

For coding workloads, Qwen 2.5 32B on Mac Studio M1 Ultra 128GB receives a A grade with 24.3 tok/s and 131K context.

What context window can Qwen 2.5 32B use on Mac Studio M1 Ultra 128GB?

On Mac Studio M1 Ultra 128GB, Qwen 2.5 32B can safely use up to 131K tokens of context. The model's official context limit is 131K, but available memory constrains the safe maximum.

Is unified memory on Mac Studio M1 Ultra 128GB as fast as VRAM for Qwen 2.5 32B?

Not always. Mac Studio M1 Ultra 128GB 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 M1 Ultra 128GB See all hardware for Qwen 2.5 32B

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