Can StableLM 2 12B run on MacBook Pro M4 Pro 48GB?

YES — Runs Great

C52Usable

Estimated — low-sample bucket· few comparable runs

StableLM 2 12B needs ~26.9 GB VRAM. MacBook Pro M4 Pro 48GB has 34.6 GB. With Q5_K_M quantization, expect ~20 tok/s.

Runtime: llama.cppCapacity: RoomyBandwidth: LowStack: 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

Q5_K_M (High quality) — 26.9 GB, 20.0 tok/s, Runs well

26.9 GB required34.6 GB available

78% VRAM used

Fit status

Runs well

Decode

20.0 tok/s

TTFT

9693 ms

Safe context

Memory

26.9 GB / 34.6 GB

Memory breakdown

Weights8.6 GB

KV Cache12.2 GB

Runtime0.9 GB

Headroom5.2 GB

See how fast it feels

See how fast it feelsStableLM 2 12B on MacBook Pro M4 Pro 48GB
1st promptCold start — includes initialization
>What is local AI inference?
Local AI inference means running an AI language model directly on your own hardware — your laptop, desktop, or server — instead of sending requests to a remote cloud API.

When you run inference locally the model weights are loaded into your GPU or unified memory. Each token you generate requires reading those weights from memory, so memory bandwidth is the main bottleneck for decode speed.

Key benefits of running locally:
  - Full privacy: your prompts never leave your machine
  - No per-token cost or rate limits
  - Works offline once the model is downloaded
  - Latency depends only on your hardware
2nd promptWarm — model ready, no init overhead
>How much VRAM do I need?
It depends on the model size and quantization level. A rough rule of thumb:

  Model size     Q4 (4-bit)    Q8 (8-bit)    FP16
  7B params      ~4.3 GB       ~7.5 GB       ~14 GB
  13B params     ~7.9 GB       ~13.9 GB      ~26 GB
  70B params     ~42.7 GB      ~74.9 GB      ~140 GB

Most people use 4-bit quantization (Q4_K_M) which gives 90-95% of full quality at a fraction of the memory. A 24 GB GPU can comfortably run most 7B-13B models.
Estimated: 20.0 tok/s decode · 9.7s TTFT (warm) · 50 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	C	Runs well	22.7 tok/s	4653 ms	4K
Coding	C	Runs well	20.0 tok/s	9693 ms	4K
Agentic Coding	D	Very compromised (needs ~1 GB host RAM)	16.4 tok/s	17186 ms	4K
Reasoning	C	Runs well	20.0 tok/s	11455 ms	4K
RAG	D	Very compromised (needs ~1 GB host RAM)	16.4 tok/s	21483 ms	4K

Quantization options

How StableLM 2 12B (12B params) fits at each quantization level on MacBook Pro M4 Pro 48GB (34.6 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	4.7 GB	Low	C43
Q3_K_S	3	5.9 GB	Low	C43
NVFP4	4	6.7 GB	Medium	C44
Q4_K_M	4	7.3 GB	Medium	C44
Q5_K_M	5	8.6 GB	High	C44
Q6_K	6	9.8 GB	High	C45
Q8_0	8	12.8 GB	Very High	C46
F16Best for your GPU	16	24.6 GB	Maximum	C48

Get started

Copy-paste commands to run StableLM 2 12B on your machine.

Run

docker run --rm -it ghcr.io/ggerganov/llama.cpp:full \
  --hf-repo "stabilityai/stablelm-2-12b-chat" \
  --hf-file "stablelm-2-12b-chat-Q5_K_M.gguf" \
  -c 4096 -ngl 99

升级选项

能流畅运行 StableLM 2 12B 的硬件

Mac Studio M2 Ultra 64GB经济之选

64 GB Unified (+16)800 GB/s (+527)

Raises estimated decode speed by about 151%.50.1 tok/s 解码

Raises estimated decode speed by about 151%.

Adds memory headroom for longer context windows and future model growth.

~$3,999 MSRP

Mac Studio M1 Ultra 64GB最佳性价比

64 GB Unified (+16)800 GB/s (+527)

Raises estimated decode speed by about 138%.47.5 tok/s 解码

Raises estimated decode speed by about 138%.

Adds memory headroom for longer context windows and future model growth.

~$3,999 MSRP

Frequently asked questions

Can MacBook Pro M4 Pro 48GB run StableLM 2 12B?

Yes, MacBook Pro M4 Pro 48GB can run StableLM 2 12B with a C grade (Runs well). Expected decode speed: 20.0 tok/s.

How much VRAM does StableLM 2 12B need?

StableLM 2 12B (12B parameters) requires approximately 26.9 GB of memory with Q5_K_M quantization.

What is the best quantization for StableLM 2 12B?

The recommended quantization for StableLM 2 12B is Q5_K_M, which balances quality and memory efficiency.

What speed will StableLM 2 12B run at on MacBook Pro M4 Pro 48GB?

On MacBook Pro M4 Pro 48GB, StableLM 2 12B achieves approximately 20.0 tokens per second decode speed with a time-to-first-token of 9693ms using Q5_K_M quantization.

Can MacBook Pro M4 Pro 48GB run StableLM 2 12B for coding?

For coding workloads, StableLM 2 12B on MacBook Pro M4 Pro 48GB receives a C grade with 20.0 tok/s and 4K context.

What context window can StableLM 2 12B use on MacBook Pro M4 Pro 48GB?

On MacBook Pro M4 Pro 48GB, StableLM 2 12B can safely use up to 4K tokens of context. The model's official context limit is 4K, but available memory constrains the safe maximum.

Is unified memory on MacBook Pro M4 Pro 48GB as fast as VRAM for StableLM 2 12B?

Not always. MacBook Pro M4 Pro 48GB 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 MacBook Pro M4 Pro 48GB See all hardware for StableLM 2 12B

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