# Can I run Qwen3 4B on iPhone 15 Pro?

Updated: 2026-06-15

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

- Model: 4B, Q4_K_M 2.5 GB
- Device: 8 GB unified, ~4.5 GB usable for weights
- Needs ~3.8 GB at Q4_K_M; recommended quant: Q4_K_M
- Best tool on iOS: Apple Foundation Models

Estimate. Method: weights + KV cache + ~0.8GB overhead. 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-15-pro