Can Gemma 4 12B run on iPhone Duo?
Some specifications for iPhone Duo are not confirmed. Compatibility and speed estimates use provisional chip or RAM information. Announced; available October 23, 2026. RAM capacity is not confirmed; results assume a provisional 12GB configuration.
NO — Won't fit
Formula estimate
What this means
None of the versions we checked fit safely on this phone. The checked version needs about 8.8 GB, while we estimate that the model can use about 7.8 GB.
Try a smaller model, or use this model on a device with more memory.
This result is calculated from the phone and model specifications. It has not been measured on this exact phone and setup.
−1GB short
memory that doesn't exist here
8.8GB
needed at Q4_0
Q4_0
quant checked
needs 8.8 GBusable 7.8 GB · short 1 GB
Apple A20 Pro12 GB RAMMetal
Three ways forward
1
Try a smaller quant
No quant of Gemma 4 12B fits this phone — even the smallest is too big. Options 2 and 3 are your real choices.
3
Run it in the cloud
The full Gemma 4 12B, no download, at data-center speed — pay per token.
provider recommendations coming later
Where the memory goes
| Component | Detail | GB |
|---|---|---|
| Model weights | Q4_0 GGUF (7 GB) + mmap overhead | 7.4 |
| KV cache | 4K context window | 0.8 |
| Runtime | llama.cpp + app overhead | 0.6 |
| Total needed | at Q4_0, 4K context | 8.8 |
| Working budget | 12 GB RAM − iOS reserve (jetsam limit) | 7.8 |
| Headroom | memory shortfall | −1 |
Pick your quant
| Quant | Download | Verdict | Speed |
|---|---|---|---|
| Q4_0 | 7 GB | ✕ Won't fit | won't fit |
Related checks
More on iPhone Duo
Gemma 4 12B on other phones