Is SmolVLM2-500M-Video-Instruct or Qwen3-0.6B smaller?

SmolVLM2-500M-Video-Instruct is smaller at Q4_K_M: 0.28 GiB against 0.37 GiB.

Which uses less memory at long context?

SmolVLM2-500M-Video-Instruct — its KV cache at 32K context is 2.8x smaller, because of how its attention layers cache.

Model comparison

SmolVLM2-500M-Video-Instruct vs Qwen3-0.6B

At Q4_K_M, SmolVLM2-500M-Video-Instruct is the smaller download — 303,253,504 bytes against 396,705,472. At long context the gap widens: SmolVLM2-500M-Video-Instruct's KV cache at 32K is 2.8× smaller, which usually matters more than the difference in weights.

From the file· summed bytes, KV per layer

Side by side

	SmolVLM2-500M-Video-Instruct	Qwen3-0.6B
Parameters	507M	752M
Architecture	llama	qwen3
Layers	32	28
Native context	8,192	40,960
Mixture of experts	no	no
Quantizations published	16	44
Smallest quantization	0.23 GiB	0.20 GiB
Q4_K_M	0.28 GiB	0.37 GiB
Licence	apache-2.0	—

KV cache by context

the term that decides long-context viability

Context	SmolVLM2-500M-Video-Instruct	Qwen3-0.6B	Ratio
4,096	0.16 GiB	0.44 GiB	2.80×
8,192	0.31 GiB	0.88 GiB	2.80×
16,384	0.63 GiB	1.75 GiB	2.80×
32,768	1.25 GiB	3.50 GiB	2.80×
65,536	2.50 GiB	7.00 GiB	2.80×
131,072	5.00 GiB	14.00 GiB	2.80×