Ollama Library · lfm2
Can I run lfm2.5-thinking?
LFM2.5 is a new family of hybrid models designed for on-device deployment.
Parameter counts and memory belong to each build below. A family can contain several sizes and tasks; fitting in memory is not a quality ranking.
Calculate memory for a build and contextlfm2.5-thinking system requirements
Memory needed at 4K context, counting model weights, KV cache, compute buffers and runtime overhead. Download sizes come from the official Ollama registry.
| Build | Quantization | Download | Memory needed |
|---|---|---|---|
| lfm2.5-thinking:1.2b1.2B parameters (tag)125K documented maximum contextBuild sourceCatalog checked 2026-10-13 | Q4_K_M | 0.7 GB | ~1.7 GB |
| lfm2.5-thinking:1.2b-q8_01.2B parameters (tag)125K documented maximum contextBuild sourceCatalog checked 2026-10-13 | Q8_0 | 1.2 GB | ~2.2 GB |
Showing the 2 smallest non-alias builds. Choose any build and change the context. A context above the build's documented maximum is a hypothetical calculation, not a supported setting.
How to run lfm2.5-thinking locally
- 1.Install Ollama for Windows, macOS or Linux.
- 2.Download this exact build in a terminal:
ollama pull lfm2.5-thinking:1.2b - 3.Check the source for the build's task. For text generation, run
ollama run lfm2.5-thinking:1.2b. Base/text builds may need a prompt template; an instruct build is usually the appropriate starting point for a conversation.
Frequently asked questions about lfm2.5-thinking
- How much VRAM do I need to run lfm2.5-thinking?
- At 4K context, the smallest published build of lfm2.5-thinking (Q4_K_M) needs roughly 1.7 GB of GPU memory once weights, KV cache, compute buffers and runtime overhead are counted. Bigger quantizations and longer context windows need more. It can also run partly or entirely on the CPU using system RAM, more slowly.
- Can I run lfm2.5-thinking without a dedicated GPU?
- A supported CPU runtime can use system RAM. The smallest listed build needs an estimated 1.7 GB at 4K context, plus headroom for your operating system. Check the build's runtime requirements. We have not measured its speed on your CPU.
- How big is the lfm2.5-thinking download?
- The smallest published build is 0.7 GB. There are 2 builds in total, the largest being 1.2 GB. Leave some extra free disk space beyond the download itself.
- How do I run lfm2.5-thinking locally?
- Install Ollama, then download a specific build with "ollama pull lfm2.5-thinking:1.2b". For a build that supports text generation, use ollama run with the same tag. Check the model source for its task and prompt format.
Will lfm2.5-thinking run on your PC?
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Model data from the official Ollama registry · verified 13/10/2026