Apple A17 Pro8 GB RAM2023

Run Gemma 4 on iPhone 15 Pro with Google AI Edge Gallery

iPhone 15 Pro was the first 8 GB iPhone, and that extra memory is exactly what makes it a viable target for Gemma 4 in 2026. The A17 Pro chip handles Gemma 4 E2B at an estimated 22 tokens per second through Google AI Edge Gallery — slower than newer iPhones but still fast enough for comfortable conversation. If you already own this phone, you do not need to upgrade for serious on-device AI.

Verdict

Recommended: Gemma 4 E2B

iPhone 15 Pro is the oldest iPhone where Gemma 4 feels genuinely fast. 8 GB RAM and A17 Pro keep it relevant.

Hardware Profile

Device

iPhone 15 Pro

Chip

Apple A17 Pro

RAM

8 GB

Neural Engine

16-core

Gemma 4 Performance on iPhone 15 Pro

Model	Download	RAM in Use	Speed	Source
Gemma 4 E2BTop Pick	~2.5 GB	1–1.5 GB	~22 tok/s	Estimated
Gemma 4 E4B	~5 GB	2–3 GB	~11 tok/s	Estimated

Speeds via Google AI Edge Gallery on iOS 17+. "Measured" numbers come from real-world Hacker News user reports; "Estimated" numbers are interpolations from chip generation. Both Gemma 4 variants use int4 quantization-aware training.

+ Best for

→iPhone 15 Pro and 15 Pro Max owners who want to stay current
→Gemma 4 E2B for daily chat and writing
→Offline use during travel or low-signal areas
→No-upgrade path to capable on-device AI

! Watch outs

→A17 Pro is roughly 30% slower than A18 Pro at neural workloads
→Gemma 4 E4B is borderline — prefer E2B
→Sustained inference will warm the device under heavy use

Setup Guide

Step-by-step install for Google AI Edge Gallery on iPhone 15 Pro, plus full benchmarks and the privacy details.

Read the full guide →

Frequently Asked Questions

Does iPhone 15 Pro support Google AI Edge Gallery?+

Yes. iPhone 15 Pro runs iOS 17 and later and meets the Google AI Edge Gallery system requirements. Both Gemma 4 E2B and E4B variants are supported, with E2B as the recommended daily-use pick.

How fast is Gemma 4 on iPhone 15 Pro?+

Estimated at roughly 22 tokens per second for Gemma 4 E2B on the A17 Pro. That is slower than the iPhone 16 Pro's measured 30 tok/s but still fast enough for fluent, conversational use. We have not seen measured real-world numbers yet for this exact device.

Is iPhone 15 Pro still good for local AI in 2026?+

Yes. With 8 GB of RAM and the A17 Pro's 16-core Neural Engine, iPhone 15 Pro handles Gemma 4 E2B and Apple Intelligence comfortably. The newer iPhone 16 Pro and 17 Pro are faster, but the gap is incremental — there is no urgent reason to upgrade for AI alone.

Can iPhone 15 Pro run Gemma 4 E4B?+

Technically yes, with caveats. The 5 GB download fits in storage, and the 2–3 GB active memory load works on 8 GB RAM, but iOS will aggressively close background apps. Expect ~11 tok/s. For sustained E4B use, iPhone 17 Pro with 12 GB RAM is the better target.