Can CodeGeeX 4 9B run on Mac Studio M3 Ultra 256GB?

YES — Runs Great

A74Great

Estimated from fit model

CodeGeeX 4 9B needs ~34.6 GB VRAM. Mac Studio M3 Ultra 256GB has 184.3 GB. With Q4_K_M quantization, expect ~111 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) — 34.6 GB, 111.0 tok/s, Runs well

34.6 GB required184.3 GB available

19% VRAM used

Fit status

Runs well

Decode

111.0 tok/s

TTFT

1745 ms

Safe context

131K

Memory

34.6 GB / 184.3 GB

Memory breakdown

Weights5.5 GB

KV Cache0.6 GB

Runtime0.9 GB

Headroom27.6 GB

See how fast it feels

See how fast it feelsCodeGeeX 4 9B on Mac Studio M3 Ultra 256GB
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: 111.0 tok/s decode · 1.7s TTFT (warm) · 277 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	111.0 tok/s	952 ms	131K
Coding	A	Runs well	111.0 tok/s	1745 ms	131K
Agentic Coding	A	Runs well	111.0 tok/s	2538 ms	131K
Reasoning	A	Runs well	111.0 tok/s	2062 ms	131K
RAG	A	Runs well	111.0 tok/s	3173 ms	131K

Quantization options

How CodeGeeX 4 9B (9B params) fits at each quantization level on Mac Studio M3 Ultra 256GB (184.3 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	3.5 GB	Low	B65
Q3_K_S	3	4.4 GB	Low	B65
NVFP4	4	5.0 GB	Medium	B65
Q4_K_M	4	5.5 GB	Medium	B65
Q5_K_M	5	6.5 GB	High	B65
Q6_K	6	7.4 GB	High	B65
Q8_0	8	9.6 GB	Very High	B65
F16Best for your GPU	16	18.5 GB	Maximum	B65

Get started

Copy-paste commands to run CodeGeeX 4 9B on your machine.

Run

docker run --rm -it ghcr.io/ggerganov/llama.cpp:full \
  --hf-repo "THUDM/codegeex4-all-9b" \
  --hf-file "codegeex4-all-9b-Q4_K_M.gguf" \
  -c 4096 -ngl 99

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
Qwen3-Coder 30B A3B Instruct	30.5B	S	84.2 tok/s
Qwen 3.5 27B	27B	S	36.5 tok/s
Qwen 3.6 27B	27B	S	27.8 tok/s
Qwen 3.5 122B A10B	122B	S	34.7 tok/s

Frequently asked questions

Can Mac Studio M3 Ultra 256GB run CodeGeeX 4 9B?

Yes, Mac Studio M3 Ultra 256GB can run CodeGeeX 4 9B with a A grade (Runs well). Expected decode speed: 111.0 tok/s.

How much VRAM does CodeGeeX 4 9B need?

CodeGeeX 4 9B (9B parameters) requires approximately 34.6 GB of memory with Q4_K_M quantization.

What is the best quantization for CodeGeeX 4 9B?

The recommended quantization for CodeGeeX 4 9B is Q4_K_M, which balances quality and memory efficiency.

What speed will CodeGeeX 4 9B run at on Mac Studio M3 Ultra 256GB?

On Mac Studio M3 Ultra 256GB, CodeGeeX 4 9B achieves approximately 111.0 tokens per second decode speed with a time-to-first-token of 1745ms using Q4_K_M quantization.

Can Mac Studio M3 Ultra 256GB run CodeGeeX 4 9B for coding?

For coding workloads, CodeGeeX 4 9B on Mac Studio M3 Ultra 256GB receives a A grade with 111.0 tok/s and 131K context.

What context window can CodeGeeX 4 9B use on Mac Studio M3 Ultra 256GB?

On Mac Studio M3 Ultra 256GB, CodeGeeX 4 9B 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 M3 Ultra 256GB as fast as VRAM for CodeGeeX 4 9B?

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 CodeGeeX 4 9B

Embed this result▼

Paste this snippet into any page to show a live fit card.

<iframe src="https://willitrunai.com/embed/codegeex-4-9b-on-m3-ultra-256gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>

Preview:

Workload

Grade

Fit

Decode

TTFT

Context

Chat

Runs well

111.0 tok/s

952 ms

131K

Coding

Runs well

111.0 tok/s

1745 ms

131K

Agentic Coding

Runs well

111.0 tok/s

2538 ms

131K

Reasoning

Runs well

111.0 tok/s

2062 ms

131K

RAG

Runs well

111.0 tok/s

3173 ms

131K

Quantization options

How CodeGeeX 4 9B (9B params) fits at each quantization level on Mac Studio M3 Ultra 256GB (184.3 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	3.5 GB	Low	B65
Q3_K_S	3	4.4 GB	Low	B65
NVFP4	4	5.0 GB	Medium	B65
Q4_K_M	4	5.5 GB	Medium	B65
Q5_K_M	5	6.5 GB	High	B65
Q6_K	6	7.4 GB	High	B65
Q8_0	8	9.6 GB	Very High	B65
F16Best for your GPU	16	18.5 GB	Maximum	B65

Model

Params

Grade

Decode

Capabilities

Devstral 2 123B Instruct

123B

8.1 tok/s

Qwen3-Coder 30B A3B Instruct

30.5B

84.2 tok/s

Qwen 3.5 27B

27B

36.5 tok/s

Qwen 3.6 27B

27B

27.8 tok/s

Qwen 3.5 122B A10B

122B

34.7 tok/s

Frequently asked questions

Can Mac Studio M3 Ultra 256GB run CodeGeeX 4 9B?

Yes, Mac Studio M3 Ultra 256GB can run CodeGeeX 4 9B with a A grade (Runs well). Expected decode speed: 111.0 tok/s.

How much VRAM does CodeGeeX 4 9B need?

CodeGeeX 4 9B (9B parameters) requires approximately 34.6 GB of memory with Q4_K_M quantization.

What is the best quantization for CodeGeeX 4 9B?

The recommended quantization for CodeGeeX 4 9B is Q4_K_M, which balances quality and memory efficiency.

What speed will CodeGeeX 4 9B run at on Mac Studio M3 Ultra 256GB?

On Mac Studio M3 Ultra 256GB, CodeGeeX 4 9B achieves approximately 111.0 tokens per second decode speed with a time-to-first-token of 1745ms using Q4_K_M quantization.

Can Mac Studio M3 Ultra 256GB run CodeGeeX 4 9B for coding?

For coding workloads, CodeGeeX 4 9B on Mac Studio M3 Ultra 256GB receives a A grade with 111.0 tok/s and 131K context.

What context window can CodeGeeX 4 9B use on Mac Studio M3 Ultra 256GB?

On Mac Studio M3 Ultra 256GB, CodeGeeX 4 9B 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 M3 Ultra 256GB as fast as VRAM for CodeGeeX 4 9B?