Head-to-head · Gemma
Gemma 3 4B vs Gemma 4 12B
Gemma 3 4B needs ~3.8 GB at Q4_K_M; Gemma 4 12B needs ~8.7 GB. That ~4.9 GB gap decides which hardware runs each; they differ on 5 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 Gemma 4 12B needs ~8.7 GB; Gemma 3 4B runs on lighter hardware at ~3.8 GB with more headroom and faster responses. Check each against your exact device: what runs Gemma 3 4B · what runs Gemma 4 12B.
More Gemma comparisons
FAQ
What is the difference in memory between Gemma 3 4B and Gemma 4 12B?
At Q4_K_M, Gemma 3 4B needs about 3.8 GB and Gemma 4 12B needs about 8.7 GB, a difference of ~4.9 GB.
Should I run Gemma 3 4B or Gemma 4 12B?
Run Gemma 4 12B if your hardware has the ~8.7 GB it needs and you want maximum quality; run Gemma 3 4B (~3.8 GB) for lighter hardware, faster responses, and more memory headroom.
Full breakdowns: Gemma 3 4B · Gemma 4 12B · all models × devices.
Sources
Memory figures are estimates at Q4_K_M, validated 2026-08-03. See methodology.