Can Phi-4 14B run on iPhone Air?
YES — Runs, barely
Grade B · 61/100 · formula estimate
What this means
Our estimate says Phi-4 14B should fit, but there is very little memory left for the operating system and other apps.
Download the Q2_K version, which is about 5.5 GB. We expect it to use about 7.4 GB of the roughly 7.8 GB available to a model on this phone.
At the estimated speed, a roughly 300-word answer may take about 63 seconds to finish.
This result is calculated from the phone and model specifications. It has not been measured on this exact phone and setup.
6.3tokens/s
estimated · reading pace
7.4GB
needed at Q2_K
Q2_K
quant checked
B
grade · 61/100
needs 7.4 GBusable 7.8 GB
Apple A19 Pro12 GB RAMMetal
Make it bearable
1
Drop context to 2K — saves ~0.5 GB of KV cache and a little speed.
2
Close every other app before loading — the 0.4 GB headroom is real; iOS may evict the model otherwise.
3
Expect throttling after ~10 min of sustained generation on a phone chassis.
See how fast it feels
Estimated at 6.3 tokens/s — reading pace. A ~300-word reply takes about 63 seconds on this phone.
Where the memory goes
| Component | Detail | GB |
|---|---|---|
| Model weights | Q2_K GGUF (5.5 GB) + mmap overhead | 5.8 |
| KV cache | 4K context window | 1 |
| Runtime | llama.cpp + app overhead | 0.6 |
| Total needed | at Q2_K, 4K context | 7.4 |
| Usable on iPhone Air | 12 GB RAM − iOS reserve (jetsam limit) | 7.8 |
| Headroom | left for the OS and your other apps | 0.4 |
Pick your quant
| Quant | Download | Verdict | Speed |
|---|---|---|---|
| Q2_K BEST HERE | 5.5 GB | ! Runs, barely | ~6.3 tokens/s |
| Q3_K_M | 7.4 GB | ✕ Won't fit | won't fit |
| IQ4_XS | 7.9 GB | ✕ Won't fit | won't fit |
| Q4_0 | 8.4 GB | ✕ Won't fit | won't fit |
| Q4_K_S | 8.4 GB | ✕ Won't fit | won't fit |
| Q4_K_M | 9.1 GB | ✕ Won't fit | won't fit |
| Q5_K_M | 10.6 GB | ✕ Won't fit | won't fit |
| Q6_K | 12 GB | ✕ Won't fit | won't fit |
| Q8_0 | 15.6 GB | ✕ Won't fit | won't fit |
Get it running in 3 steps
1
Install PocketPal from the App Store — free, no account needed.
2
Download "Phi-4 14B Q2_K" in the in-app model hub — 5.5 GB, use Wi-Fi. Search Hugging Face for
bartowski/phi-4-GGUF and pick the Q2_K file.3
Set context to 4K and enable Metal — expect ~6.3 tokens/s on this phone.
Related checks
MORE ON IPHONE AIR
PHI-4 14B ON OTHER PHONES