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text model · SmolLM2 · macOS

Can I run SmolLM2 135M on Apple M5 Pro (48GB)?

Compatibility verdict VRAM threshold engine
Yes, it runs GPU accelerated ~2339 tok/s est.

Yes. SmolLM2 135M runs on Apple M5 Pro (48GB) at Q4_K_M (~1 GB of ~32 GB usable).

Needs ~1 GB Device usable ~32 GB

Runs at Q4_K_M using ~1 GB of ~32 GB usable. You have room for FP16 for higher quality.

That figure is at a 4k context and moves about ±15% as context length changes. Apple M5 Pro (48GB) leaves ~31 GB of headroom, room to step up to FP16 for higher quality.

Q4_K_M needed
~1 GB
Usable on device
~32 GB
Device memory
48 GB
Best quant
Q4_K_M
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Which quant fits

Quant ladder vs ~32 GB usable
Q2_K
~1 GB
Q3_K_M
~1 GB
Q4_K_M
~1 GB
Q5_K_M
~1 GB
Q6_K
~1 GB
Q8_0
~1 GB
FP16
~1.2 GB
The line marks Apple M5 Pro (48GB)'s ~32 GB budget; rungs past it are too large.

Run it

Install commands macOS

Pick your tool. All 3 load the same Q4_K_M weights.

Ollama
$ ollama run smollm2:135m
llama.cpp
$ llama-cli -hf bartowski/SmolLM2-135M-Instruct-GGUF:Q4_K_M
LM Studio
$ lms get bartowski/SmolLM2-135M-Instruct-GGUF
Model SmolLM2
Parameters
0.135B
Q4_K_M size
0.105 GB
Q8_0 size
0.145 GB
Context
2k
Ollama tag
smollm2:135m
Full SmolLM2 135M requirements →
Device macOS
Memory
48 GB unified
Usable for weights
~32 GB
Best runtime
MLX direct / Ollama (MLX backend)
Best models for Apple M5 Pro (48GB) →

You could also run

Run SmolLM2 135M on other hardware

FAQ

Can Apple M5 Pro (48GB) run SmolLM2 135M?

Yes. SmolLM2 135M runs on Apple M5 Pro (48GB) at Q4_K_M (~1 GB of ~32 GB usable).

How much memory does SmolLM2 135M need?

Apple M5 Pro (48GB) has room to spare. At Q4_K_M the weights are ~0.105 GB; with KV cache and runtime overhead, budget ~1 GB at a 4k context.

What is the best tool to run SmolLM2 135M on macOS?

LM Studio for a simple setup; mlx-lm for the most speed. vLLM is NOT a Mac tool, it is a CUDA/Linux serving engine. Unified memory is not a fixed VRAM slice; ~70% is usable for weights.

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Sources

Weights are measured from GGUF files; KV cache and overhead are computed, so totals can vary ~15% with context and runtime. Any tok/s is a bandwidth estimate. See methodology.