audio model · whisper · iOS
Can I run Whisper large-v3 on iPhone 15 Pro?
Yes. Whisper large-v3 runs on iPhone 15 Pro at int8 (~2.5 GB of ~4.5 GB usable).
Runs at int8 using ~2.5 GB of ~4.5 GB usable.
- Peak memory
- ~2.5 GB
- Usable on device
- ~4.5 GB
- Device memory
- 8 GB
- Quant
- int8
How to run it
Use whisper.cpp or faster-whisper at int8. It is light enough to run on CPU; a GPU just makes it faster.
- Type
- Speech to text
- Parameters
- 1.55B
- Peak memory
- ~2.5 GB at int8
- License
- MIT
- Memory
- 8 GB unified
- Usable for weights
- ~4.5 GB
- Best runtime
- llama.cpp + Metal (via PocketPal or Off Grid app)
You could also run
Run Whisper large-v3 on other hardware
FAQ
Can iPhone 15 Pro run Whisper large-v3?
Yes. Whisper large-v3 runs on iPhone 15 Pro at int8 (~2.5 GB of ~4.5 GB usable).
How much memory does Whisper large-v3 need?
iPhone 15 Pro has room to spare. At int8 the realistic peak is ~2.5 GB of memory.
What do I use to run Whisper large-v3 locally?
Whisper large-v3 runs in whisper.cpp or faster-whisper (among others). It runs on CPU, so no GPU is required.
Sources
VRAM figures are sourced peak-usage anchors at the noted quant, validated 2026-06-15. See methodology.