# Can I run Qwen3 4B on iPhone 17?

> **Yes, but tight.** Fits at Q4_K_M (~3.8 GB of ~4.5 GB usable) but with little headroom, close other apps.

Last validated: 2026-06-15.

## Memory math
- Qwen3 4B: 4B; Q4_K_M weighs 2.5 GB on disk.
- At Q4_K_M with a 4k context it needs ~3.8 GB (weights + KV cache + ~0.8 GB runtime overhead, ±15% with context length).
- iPhone 17: 8 GB unified, ~4.5 GB usable for model weights.
- Headroom: ~0.7 GB.

## How to run
Recommended quant: Q4_K_M. Best tool on iOS: Apple Foundation Models.

## Run Qwen3 4B on other devices
- [Apple M1 (8GB)](https://localmodel.run/can-i-run/qwen3-4b/apple-m1-8gb)
- [8GB RAM Laptop (CPU/iGPU only)](https://localmodel.run/can-i-run/qwen3-4b/laptop-8gb)
- [iPhone 15 Pro](https://localmodel.run/can-i-run/qwen3-4b/iphone-15-pro)
- [iPhone 16](https://localmodel.run/can-i-run/qwen3-4b/iphone-16)
- [iPhone 16 Pro](https://localmodel.run/can-i-run/qwen3-4b/iphone-16-pro)
- [Generic Android Phone (8GB RAM)](https://localmodel.run/can-i-run/qwen3-4b/android-generic-8gb)

## Other models that run on iPhone 17
- [Gemma 3 4B (4B)](https://localmodel.run/can-i-run/gemma-3-4b/iphone-17)
- [Phi-3.5-mini 3.8B (3.82B)](https://localmodel.run/can-i-run/phi-3.5-mini/iphone-17)
- [Phi-4-mini 3.8B (3.8B)](https://localmodel.run/can-i-run/phi-4-mini-3.8b/iphone-17)
- [Qwen2.5-VL 3B (3.75B)](https://localmodel.run/can-i-run/qwen2.5-vl-3b/iphone-17)
- [Qwen2.5 3B (3.09B)](https://localmodel.run/can-i-run/qwen2.5-3b/iphone-17)
- [Qwen2.5 Coder 3B (3.09B)](https://localmodel.run/can-i-run/qwen2.5-coder-3b/iphone-17)

Estimate, not a guarantee. Sources: https://ollama.com/library/qwen3:4b, https://huggingface.co/Qwen/Qwen3-4B-GGUF, https://github.com/QwenLM/Qwen3.
More: https://localmodel.run/can-i-run/qwen3-4b/iphone-17