# How fast is Qwen3.5 4B on the iPhone 15 Pro Max?

> Qwen3.5 4B writes about 12 tokens per second on the iPhone 15 Pro Max in Loci, with the first word in 6.0 s. Measured on 13 iPhones; 90-day sample: 2026-08-08 to 2026-11-06.

Canonical: https://askloci.ai/speed/iphone-15-pro-max/qwen3-5-4b/
Last updated: 2026-11-06

About 12 tokens per second, faster than reading. The first word arrives after 6.0 seconds.

**12 tokens per second**

Faster than reading

First word in 6.0 s · a 300-word answer in about 39 s

### What 12 tokens per second looks like

Sure. Start with the task you have been putting off, while your focus is fresh. Give it one uninterrupted hour, then take a short walk. Answer messages in one batch after lunch, and keep the last half hour to plan tomorrow, so the morning starts without decisions.

Typical range 11–14 tokens per second · 13 iPhones · 90-day sample: 2026-08-08 to 2026-11-06

A17 Pro · 8 GB

## Qwen3.5 4B on other iPhones

- [iPhone 17](https://askloci.ai/speed/iphone-17/qwen3-5-4b/) — 19 tok/s · First word 1.9 s · 14 iPhones
- [iPhone 16 Pro](https://askloci.ai/speed/iphone-16-pro/qwen3-5-4b/) — 15 tok/s · First word 3.8 s · 11 iPhones
- [iPhone 16 Pro Max](https://askloci.ai/speed/iphone-16-pro-max/qwen3-5-4b/) — 13 tok/s · First word 5.1 s · 13 iPhones
- [iPhone 15 Pro Max](https://askloci.ai/speed/iphone-15-pro-max/qwen3-5-4b/) — 12 tok/s · First word 6.0 s · 13 iPhones · 90-day sample: 2026-08-08 to 2026-11-06

## Other models on the iPhone 15 Pro Max

- [Gemma 4 E2B](https://askloci.ai/speed/iphone-15-pro-max/gemma-4-e2b/) — 38 tok/s · First word 1.9 s · 24 iPhones

- [Every model on the iPhone 15 Pro Max](https://askloci.ai/speed/iphone-15-pro-max/)
- [Qwen3.5 4B on every device](https://askloci.ai/speed/models/qwen3-5-4b/)

## Run Qwen3.5 4B on your iPhone

Loci is free, needs no account, and keeps every conversation on your device.

- [Download for iPhone](https://apps.apple.com/app/id6762100748)

30-day results and labeled 90-day samples, through November 6, 2026 · updated daily

## How these speeds are measured

- Every number comes from real chats in Loci, timed on the device that wrote the answer, with Loci's default settings.
- **Tokens per second** is how fast an answer is written once it starts. On phones, four characters of text count as one token for every model; on a Mac, Loci counts the model's own tokens. Reading pace is about 5.
- **First word** is how long an answer takes to start after you send a message. Longer conversations take longer.
- Each device counts once. The large number is the median; the typical range covers the middle half of devices.
- Results use the last 30 days when enough devices have been measured. Otherwise, labeled 90-day samples include older measurements under the same sample and app-version requirements.
- Each phone speed comes from at least 10 phones of that model. Different phone models and Android chip variants are measured separately. Open a result to see its sample size.
- On phones, answers written in Low Power Mode or Battery Saver, in the background, or with web search or other tools are left out.

[Methods, fixed editions and citations](https://askloci.ai/speed/research/)

[Check model requirements for your device](https://askloci.ai/can-my-device-run/)