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text model · SmolLM2 · iOS

Can I run SmolLM2 1.7B on iPhone 17 Pro?

Compatibility verdict VRAM threshold engine
Yes, it runs usable speed ~36 tok/s est.

Yes. SmolLM2 1.7B runs on iPhone 17 Pro at Q4_K_M (~2.2 GB of ~8 GB usable).

Needs ~2.2 GB Device usable ~8 GB

Runs at Q4_K_M using ~2.2 GB of ~8 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. iPhone 17 Pro leaves ~5.8 GB of headroom, room to step up to FP16 for higher quality.

Q4_K_M needed
~2.2 GB
Usable on device
~8 GB
Device memory
12 GB
Best quant
Q4_K_M
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Which quant fits

Quant ladder vs ~8 GB usable
Q2_K
~1.8 GB
Q3_K_M
~1.9 GB
Q4_K_M
~2.2 GB
Q5_K_M
~2.3 GB
Q6_K
~2.5 GB
Q8_0
~2.9 GB
FP16
~4.5 GB
The line marks iPhone 17 Pro's ~8 GB budget; rungs past it are too large.

Running cost · estimate

Power & economics est.
Power draw
~12 W
Electricity / 1M tokens
~$0.01
Pays for itself after
~2,243M tok

At ~$0.15/kWh and the estimated ~36 tok/s, a million generated tokens costs about $0.01 in electricity. Versus a hosted API at ~$0.5 per million tokens, the ~$1,099 iPhone 17 Pro pays for itself after roughly 2,243 million tokens, so local hardware is mostly a fixed cost, not a per-token one. TDP is the peak draw, so this is an upper bound. Assumptions.

How to run it

On iOS use Apple Foundation Models (Built into iOS 26, ~3B on-device model, zero download, fully private.).

Model SmolLM2
Parameters
1.7B
Q4_K_M size
1.06 GB
Q8_0 size
1.82 GB
Context
8k
Ollama tag
smollm2:1.7b
Full SmolLM2 1.7B requirements →
Device iOS
Memory
12 GB unified
Usable for weights
~8 GB
Power draw
~12 W
Best runtime
llama.cpp + Metal (via PocketPal or Off Grid app)
Best models for iPhone 17 Pro →

You could also run

Run SmolLM2 1.7B on other hardware

FAQ

Can iPhone 17 Pro run SmolLM2 1.7B?

Yes. SmolLM2 1.7B runs on iPhone 17 Pro at Q4_K_M (~2.2 GB of ~8 GB usable).

How much memory does SmolLM2 1.7B need?

iPhone 17 Pro has room to spare. At Q4_K_M the weights are ~1.06 GB; with KV cache and runtime overhead, budget ~2.2 GB at a 4k context.

What is the best tool to run SmolLM2 1.7B on iOS?

On iPhone and iPad, Apple Foundation Models (Built into iOS 26, ~3B on-device model, zero download, fully private.) is the standard choice. Phones realistically run 1B-4B class models. Anything larger thermally throttles or OOMs.

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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.