Is Qwen3.6-27B or magnum-v4-72b smaller?

Qwen3.6-27B is smaller at Q4_K_M: 15.41 GiB against 44.16 GiB.

Which uses less memory at long context?

Qwen3.6-27B — its KV cache at 32K context is 5.0x smaller, because of how its attention layers cache.

Model comparison

Qwen3.6-27B vs magnum-v4-72b

At Q4_K_M, Qwen3.6-27B is the smaller download — 16,547,397,888 bytes against 47,415,715,008. At long context the gap widens: Qwen3.6-27B's KV cache at 32K is 5.0× smaller, which usually matters more than the difference in weights.

From the file· summed bytes, KV per layer

Side by side

	Qwen3.6-27B	magnum-v4-72b
Parameters	27.8B	72.7B
Architecture	qwen35	qwen2
Layers	64	80
Native context	262,144	32,768
Mixture of experts	no	no
Quantizations published	40	44
Smallest quantization	8.74 GiB	21.13 GiB
Q4_K_M	15.41 GiB	44.16 GiB
Licence	apache-2.0	apache-2.0

KV cache by context

the term that decides long-context viability

Context	Qwen3.6-27B	magnum-v4-72b	Ratio
4,096	0.25 GiB	1.25 GiB	5.00×
8,192	0.50 GiB	2.50 GiB	5.00×
16,384	1.00 GiB	5.00 GiB	5.00×
32,768	2.00 GiB	10.00 GiB	5.00×
65,536	4.00 GiB	20.00 GiB	5.00×
131,072	8.00 GiB	40.00 GiB	5.00×