How fast does LFM2 1.2B (GGUF) run on iPhone?
On an iPhone Air (A19, iOS 26.6.1), LFM2 1.2B (GGUF) generated 77.3 tokens per second in Pocket AI Lab 1.1.0, averaged over 3 runs of 200 tokens (± 0.4).
On the standard llama-bench style probe it read a 512-token prompt at about 1,534 tok/s and generated 128 tokens at 75.9 tok/s. Cold load took 0.1 s and the process peaked at 249 MB.
How much memory and storage does LFM2 1.2B (GGUF) need?
The catalog budgets 1.4 GB of RAM and 800 MB of storage for the Q4_K_M build of LFM2 1.2B (GGUF). The measured peak footprint on iPhone Air was 249 MB. The 1.4 GB figure is the memory budget the app requires to load the model with its context, while 249 MB is what our benchmark run actually used.
It runs on a memory-mapped backend, so the app checks it against the Metal working set rather than the stricter per-app limit. Weights are read from disk as needed, which keeps the measured footprint low.
Which iPhones can run LFM2 1.2B (GGUF)?
LFM2 1.2B (GGUF) runs on iPhones with 3–4 GB of RAM or more, which is every iPhone that runs iOS 26.
| RAM | iPhones | Pocket AI Lab |
|---|---|---|
| 3–4 GB | iPhone 11, 11 Pro, 12, 12 mini, 13, 13 mini, SE (2nd and 3rd gen) | ✓ Runs |
| 6 GB | iPhone 12 Pro, 13 Pro, 14, 14 Plus, 14 Pro, 15, 15 Plus | ✓ Runs |
| 8 GB | iPhone 15 Pro, 16, 16 Plus, 16 Pro, 16e, 17, 17e | ✓ Runs |
| 12 GB | iPhone 17 Pro, 17 Pro Max, iPhone Air | ✓ Runs |
Based on the memory budgets the app measures on each class of iPhone (October 2026). Before downloading, the app checks your exact phone and only offers what fits.
What can LFM2 1.2B (GGUF) do in Pocket AI Lab?
It's a text model for chat, drafting, summaries and quick questions, fully offline once downloaded.
How did LFM2 1.2B (GGUF) score on the quality suite?
It passed 69 of 118 tasks, a score of 58.5 out of 100 on suite v3.
Tasks are graded by deterministic checks (exact numbers, regex, word counts, valid JSON), with greedy decoding. See the method.
All runs of LFM2 1.2B (GGUF)
| Model | Gen tok/s | pp512 / tg128 | Load s | Peak MB | Score | Date |
|---|---|---|---|---|---|---|
| LFM2 1.2B (GGUF) | 77.8 ± 0.3 | ~1,624 / 76.4 | 0.5 | 203 | 58.5 | 2026-10-21 |
| LFM2 1.2B (GGUF) | 77.3 ± 0.4 | ~1,534 / 75.9 | 0.1 | 249 | 58.5 | 2026-10-23 |
Other LFM models in the catalog
- LFM2 2.6B (GGUF), llama.cpp, Q4_K_M, 35.9 tok/s
How do I install LFM2 1.2B (GGUF)?
Open the Models tab in Pocket AI Lab and tap LFM2 1.2B (GGUF). The app checks it against your phone's memory, downloads 800 MB from Hugging Face and it's ready for offline chat.