StableLM 2 12B needs ~25.2 GB VRAM. MacBook Pro M2 Pro 32GB has 23.0 GB. With Q5_K_M quantization, expect ~13 tok/s.
Operating mode
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.
Select quantization to explore
2.2 GB over capacity — needs offload or smaller quantization
Fit status
Very compromised (needs ~0.7 GB host RAM)
Decode
13.0 tok/s
TTFT
14896 ms
Safe context
4K
Memory
25.2 GB / 23.0 GB
Offload
10%
It fits through host-memory offload, and offload is the main reason performance drops.
CPU or host-memory offload is active
About 10% of the working set spills out of accelerator memory, which usually hurts latency and sustained decode throughput.
Very little memory headroom
You can run the model, but there is not much room left for longer context, bigger batches, extra apps, or future model updates.
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.
Remove offload with more accelerator memory
Prioritize a GPU or unified-memory tier that fits the whole model natively. Removing offload usually helps more than small compute gains.
Buy headroom, not only minimum fit
A slightly larger memory tier gives you safer context growth and makes the recommendation more future-proof.
Increase host RAM if you keep offloading
This setup may need roughly 0.7 GB of extra host RAM just for the offloaded portion, before OS and other tools.
| Workload | Grade | Fit | Decode | TTFT | Context |
|---|---|---|---|---|---|
| Chat | C | Tight fit | 15.1 tok/s | 6986 ms | 4K |
| Coding | D | Very compromised (needs ~0.7 GB host RAM) | 13.0 tok/s | 14896 ms | 4K |
| Agentic Coding | F | Too heavy | 8.1 tok/s | 34829 ms | 4K |
| Reasoning | D | Very compromised (needs ~0.7 GB host RAM) | 13.0 tok/s | 17605 ms | 4K |
| RAG | F | Too heavy | 8.1 tok/s | 43536 ms | 4K |
How StableLM 2 12B (12B params) fits at each quantization level on MacBook Pro M2 Pro 32GB (23.0 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 4.7 GB | Low | C45 |
Q3_K_S | 3 | 5.9 GB | Low | C46 |
NVFP4 | 4 | 6.7 GB | Medium | C47 |
Q4_K_M | 4 | 7.3 GB | Medium | C47 |
Q5_K_M | 5 | 8.6 GB | High | C48 |
Q6_K | 6 | 9.8 GB | High | C49 |
Q8_0Best for your GPU | 8 | 12.8 GB | Very High | C50 |
F16 | 16 | 24.6 GB | Maximum | F0 |
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 99Opciones de mejora
Elimina el offload a memoria del sistema, que suele ser la mayor mejora individual en latencia y throughput.
Añade margen de memoria para más contexto y para que el modelo envejezca mejor.
~$1,099 MSRP
Elimina el offload a memoria del sistema, que suele ser la mayor mejora individual en latencia y throughput.
Sube la velocidad estimada de decodificación alrededor de un 54%.
~$1,599 MSRP
Elimina el offload a memoria del sistema, que suele ser la mayor mejora individual en latencia y throughput.
~$1,999 MSRP
RTX 5090 32GBMayor saltoElimina el offload a memoria del sistema, que suele ser la mayor mejora individual en latencia y throughput.
Sube la velocidad estimada de decodificación alrededor de un 693%.
~$1,999 MSRP
Yes, MacBook Pro M2 Pro 32GB can run StableLM 2 12B with a D grade (Very compromised (needs ~0.7 GB host RAM)). Expected decode speed: 13.0 tok/s.
StableLM 2 12B (12B parameters) requires approximately 25.2 GB of memory with Q5_K_M quantization.
The recommended quantization for StableLM 2 12B is Q5_K_M, which balances quality and memory efficiency.
On MacBook Pro M2 Pro 32GB, StableLM 2 12B achieves approximately 13.0 tokens per second decode speed with a time-to-first-token of 14896ms using Q5_K_M quantization.
For coding workloads, StableLM 2 12B on MacBook Pro M2 Pro 32GB receives a D grade with 13.0 tok/s and 4K context.
On MacBook Pro M2 Pro 32GB, 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.
Remove offload with more accelerator memory. Prioritize a GPU or unified-memory tier that fits the whole model natively. Removing offload usually helps more than small compute gains.
Not always. MacBook Pro M2 Pro 32GB 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.
Paste this snippet into any page to show a live fit card.
<iframe src="https://willitrunai.com/embed/stablelm-2-12b-on-m2-pro-32gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>
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