Is Qwen3.5-4B or medgemma-4b-it smaller?

medgemma-4b-it is smaller at Q4_K_M: 2.32 GiB against 2.52 GiB.

Which uses less memory at long context?

medgemma-4b-it — its KV cache at 32K context is 1.3x smaller, because of how its attention layers cache.

Model comparison

Qwen3.5-4B vs medgemma-4b-it

At Q4_K_M, medgemma-4b-it is the smaller download — 2,489,893,664 bytes against 2,707,513,696. At long context the gap widens: medgemma-4b-it's KV cache at 32K is 1.3× smaller, which usually matters more than the difference in weights.

From the file· summed bytes, KV per layer

Side by side

	Qwen3.5-4B	medgemma-4b-it
Parameters	4.7B	4.3B
Architecture	qwen35	gemma3
Layers	32	34
Native context	262,144	131,072
Mixture of experts	no	no
Quantizations published	57	46
Smallest quantization	1.42 GiB	1.10 GiB
Q4_K_M	2.52 GiB	2.32 GiB
Licence	apache-2.0	other

KV cache by context

the term that decides long-context viability

Context	Qwen3.5-4B	medgemma-4b-it	Ratio
4,096	0.13 GiB	0.25 GiB	1.98×
8,192	0.25 GiB	0.33 GiB	1.30×
16,384	0.50 GiB	0.48 GiB	1.04×
32,768	1.00 GiB	0.79 GiB	1.26×
65,536	2.00 GiB	1.42 GiB	1.41×
131,072	4.00 GiB	2.67 GiB	1.50×