Can Ternary Bonsai 4B 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.
YES — Runs great
Formula estimate
What this means
Our estimate says Ternary Bonsai 4B should fit comfortably on your iPhone Duo.
Download the Q2_0 version, which is about 1.1 GB. We expect it to use about 2 GB of the roughly 7.8 GB available to a model on this phone.
At the estimated speed, a roughly 300-word answer may take about 8 seconds to finish.
This result is calculated from the phone and model specifications. It has not been measured on this exact phone and setup.
47.1tokens/s
estimated · instant
2GB
needed at Q2_0
Q2_0
quant checked
needs 2 GBusable 7.8 GB
Apple A20 Pro12 GB RAMMetal
See how fast it feels
Estimated at 47.1 tokens/s — instant. A ~300-word reply takes about 8 seconds on this phone.
Where the memory goes
| Component | Detail | GB |
|---|---|---|
| Model weights | Q2_0 GGUF (1.1 GB) + mmap overhead | 1.2 |
| KV cache | 4K context window | 0.3 |
| Runtime | llama.cpp + app overhead | 0.6 |
| Total needed | at Q2_0, 4K context | 2 |
| Working budget | 12 GB RAM − iOS reserve (jetsam limit) | 7.8 |
| Headroom | remaining inside the working budget | 5.8 |
Pick your quant
| Quant | Download | Verdict | Speed |
|---|---|---|---|
| Q2_0 BEST HERE | 1.1 GB | ✓ Runs great | ~47.1 tokens/s |
| Q2_0_g64 | 1.1 GB | ✓ Runs great | ~47.1 tokens/s |
Use the supported phone path
The model fits in memory, but this exact download is not a PocketPal model.
The current App Store and Play Store versions of PocketPal cannot load this tracked ternary file. Memory fit does not make this exact download beginner-ready.
For the same kind of chat in PocketPal, use this supported build instead:
Check Bonsai 27B (1-bit)Related checks
More on iPhone Duo
Ternary Bonsai 4B on other phones