Head-to-head · LFM
LFM2 1.2B vs LFM2.5 1.2B Thinking
LFM2 1.2B needs ~2.5 GB at Q4_K_M; LFM2.5 1.2B Thinking needs ~1.8 GB. That ~-0.7 GB gap decides which hardware runs each; they differ on 0 of the 14 devices below.
Which devices run each
A representative spread across the memory range. Tap a verdict for the full breakdown.
Size at each quantization
* derived from bits-per-weight; unstarred sizes are measured GGUF files.
Bottom line
The larger LFM2.5 1.2B Thinking needs ~1.8 GB; LFM2 1.2B runs on lighter hardware at ~2.5 GB with more headroom and faster responses. Check each against your exact device: what runs LFM2 1.2B · what runs LFM2.5 1.2B Thinking.
More LFM comparisons
FAQ
What is the difference in memory between LFM2 1.2B and LFM2.5 1.2B Thinking?
At Q4_K_M, LFM2 1.2B needs about 2.5 GB and LFM2.5 1.2B Thinking needs about 1.8 GB, a difference of ~-0.7 GB.
Should I run LFM2 1.2B or LFM2.5 1.2B Thinking?
Run LFM2.5 1.2B Thinking if your hardware has the ~1.8 GB it needs and you want maximum quality; run LFM2 1.2B (~2.5 GB) for lighter hardware, faster responses, and more memory headroom.
Full breakdowns: LFM2 1.2B · LFM2.5 1.2B Thinking · all models × devices.
Sources
Memory figures are estimates at Q4_K_M, validated 2026-08-03. See methodology.