# iPhone 15 Pro Max

> How fast Gemma 4 E2B and Qwen3.5 4B run on the iPhone 15 Pro Max (A17 Pro) in Loci: Gemma 4 E2B writes 38 tokens per second, first word in 1.9 s.

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

Gemma 4 E2B writes 38 tokens per second on the iPhone 15 Pro Max, with the first word in 1.9 s.

### Gemma 4 E2B

**38 tokens per second**

Much faster than reading

First word in 1.9 s · a 300-word answer in about 12 s

### What 38 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 31–40 tokens per second · 24 iPhones

[Gemma 4 E2B on the iPhone 15 Pro Max](https://askloci.ai/speed/iphone-15-pro-max/gemma-4-e2b/)

### Qwen3.5 4B

**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

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

## Every model 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
- [Qwen3.5 4B](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

## Questions

### What's the fastest AI model on the iPhone 15 Pro Max?

Gemma 4 E2B, at 38 tokens per second, with the first word in 1.9 s, measured in Loci on 24 iPhones.

### Can the iPhone 15 Pro Max run Gemma 4 E2B?

Yes: Gemma 4 E2B writes 38 tokens per second on the iPhone 15 Pro Max, much faster than reading, with the first word in 1.9 s.

### Can the iPhone 15 Pro Max run Qwen3.5 4B?

Yes: Qwen3.5 4B writes 12 tokens per second on the iPhone 15 Pro Max, faster than reading, with the first word in 6.0 s.

## Run Gemma 4 E2B 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/)