# LFM2.5 1.2B Thinking: RAM and VRAM requirements

> LFM2.5 1.2B Thinking is a 1.17B LFM model. At Q4_K_M it needs about **1.8 GB** to run and fits **40 of 40** tracked devices. Minimum to run: Apple M1 (8GB).

Last validated: 2026-08-03. Sources: Ollama, HuggingFace GGUF repos, vendor specs.

## Memory by quantization
| Quant | On disk | To run (4k context) |
| --- | --- | --- |
| Q4_K_M | 0.68 GB | ~1.8 GB |
| Q8_0 | 1.16 GB | ~2.3 GB |
| FP16 | 2.18 GB | ~3.3 GB |

Memory = weights + KV cache + ~0.8 GB runtime overhead, and varies ±15% with context length.

## Will it run on my device?
- **Apple M1 (8GB)** (8 GB): Yes, it runs (room for FP16)
- **iPhone 17** (8 GB): Yes, it runs (room for FP16)
- **iPhone 17 Pro** (12 GB): Yes, it runs (room for FP16)
- **16GB RAM Laptop (CPU/iGPU only)** (16 GB): Yes, it runs (room for FP16)
- **Google Pixel 10 Pro** (16 GB): Yes, it runs (room for FP16)
- **Nvidia GeForce RTX 3090 (24GB)** (24 GB): Yes, it runs (room for FP16)
- **Apple M4 Pro (48GB)** (48 GB): Yes, it runs (room for FP16)
- **Apple M3 Ultra (256GB)** (256 GB): Yes, it runs (room for FP16)

Full table of all 40 devices: https://localmodel.run/model/lfm2.5-1.2b-thinking

## How to run
Quickest path: `ollama run lfm2.5-thinking:1.2b`. On Mac, LM Studio (ships MLX) is fastest; on Linux, Ollama for chat or vLLM to serve; on Windows, LM Studio or Ollama.

## Details
- Parameters: 1.17B
- Default context: 128k tokens
- License: LFM Open License v1.0 (commercial use: conditional)
- Released: 2026-01
- HuggingFace: 38,183 downloads/mo, 387 likes

## FAQ
### How much VRAM or RAM does LFM2.5 1.2B Thinking need?
About 1.8 GB at Q4_K_M (weights 0.68 GB + KV cache + overhead) at a 4k context. Budget ~2.3 GB for Q8_0.
### Can LFM2.5 1.2B Thinking run on a laptop?
Yes. LFM2.5 1.2B Thinking fits on a 16 GB laptop or Mac at Q4_K_M, and runs on Apple Silicon or a 12 GB+ GPU comfortably.
### Can I use LFM2.5 1.2B Thinking commercially?
Conditionally: LFM Open License: free under $10M revenue; larger companies need a commercial license..

Sources: https://huggingface.co/LiquidAI/LFM2.5-1.2B-Thinking, https://huggingface.co/LiquidAI/LFM2.5-1.2B-Thinking-GGUF, https://ollama.com/library/lfm2.5-thinking/tags
More: https://localmodel.run/model/lfm2.5-1.2b-thinking