Is GLM-4.1V-9B-Thinking or Qwen3.5-4B smaller?

Qwen3.5-4B is smaller at Q4_K_M: 2.52 GiB against 5.74 GiB.

Which uses less memory at long context?

Qwen3.5-4B — its KV cache at 32K context is 1.2x smaller, because of how its attention layers cache.

Model comparison

GLM-4.1V-9B-Thinking vs Qwen3.5-4B

At Q4_K_M, Qwen3.5-4B is the smaller download — 2,707,513,696 bytes against 6,166,574,432. At long context the gap widens: Qwen3.5-4B's KV cache at 32K is 1.2× smaller, which usually matters more than the difference in weights.

From the file· summed bytes, KV per layer

Side by side

	GLM-4.1V-9B-Thinking	Qwen3.5-4B
Parameters	10.3B	4.7B
Architecture	glm4	qwen35
Layers	40	32
Native context	65,536	262,144
Mixture of experts	no	no
Quantizations published	43	57
Smallest quantization	2.98 GiB	1.42 GiB
Q4_K_M	5.74 GiB	2.52 GiB
Licence	mit	apache-2.0

KV cache by context

the term that decides long-context viability

Context	GLM-4.1V-9B-Thinking	Qwen3.5-4B	Ratio
4,096	0.16 GiB	0.13 GiB	1.25×
8,192	0.31 GiB	0.25 GiB	1.25×
16,384	0.63 GiB	0.50 GiB	1.25×
32,768	1.25 GiB	1.00 GiB	1.25×
65,536	2.50 GiB	2.00 GiB	1.25×
131,072	5.00 GiB	4.00 GiB	1.25×