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text model · DeepSeek-V2 · iOS

Can I run DeepSeek-V2-Lite on iPhone 16?

Compatibility verdict VRAM threshold engine
No, not enough memory would not load

No. DeepSeek-V2-Lite needs ~12.2 GB even at Q4_K_M, but iPhone 16 only has ~4.5 GB usable.

Needs ~12.2 GB Device usable ~4.5 GB

Needs ~12.2 GB even at Q4_K_M, but only ~4.5 GB is usable.

That figure is at a 4k context and moves about ±15% as context length changes.

The gap is about 7.7 GB: DeepSeek-V2-Lite needs roughly 12.2 GB at Q4_K_M and iPhone 16 leaves only about 4.5 GB usable for a model. The lightest tracked hardware that runs DeepSeek-V2-Lite is the Nvidia GeForce RTX 4060 Ti (16GB) at 16 GB. See DeepSeek-V2-Lite on Nvidia GeForce RTX 4060 Ti (16GB).

Q4_K_M needed
~12.2 GB
Usable on device
~4.5 GB
Device memory
8 GB
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Which quant fits

Quant ladder vs ~4.5 GB usable
Q2_K
~8.5 GB
Q3_K_M
~9.6 GB
Q4_K_M
~12.2 GB
Q5_K_M
~13.2 GB
Q6_K
~14.9 GB
Q8_0
~18.6 GB
FP16
~33.8 GB
The line marks iPhone 16's ~4.5 GB budget; rungs past it are too large.

How to run it

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

Model DeepSeek-V2
Parameters
16B (MoE, 2.4B active)
Q4_K_M size
10.4 GB
Q8_0 size
16.8 GB
Context
32k
Ollama tag
deepseek-v2:16b
Full DeepSeek-V2-Lite requirements →
Device iOS
Memory
8 GB unified
Usable for weights
~4.5 GB
Power draw
~11 W
Best runtime
llama.cpp + Metal (via PocketPal or Off Grid app)
Best models for iPhone 16 →

What you can run instead

Run DeepSeek-V2-Lite on other hardware

FAQ

Can iPhone 16 run DeepSeek-V2-Lite?

No. DeepSeek-V2-Lite needs ~12.2 GB even at Q4_K_M, but iPhone 16 only has ~4.5 GB usable.

How much memory does DeepSeek-V2-Lite need?

iPhone 16 does not have enough memory. At Q4_K_M the weights are ~10.4 GB; with KV cache and runtime overhead, budget ~12.2 GB at a 4k context. It is a Mixture-of-Experts model (16B total / 2.4B active), so all experts must stay in memory; memory tracks total params, not active params.

What is the best tool to run DeepSeek-V2-Lite 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.