Is qwen3.5-4b-agentic-coder-v4 or Qwen3-8B smaller?

qwen3.5-4b-agentic-coder-v4 is smaller at Q4_K_M: 2.59 GiB against 4.68 GiB.

Which uses less memory at long context?

qwen3.5-4b-agentic-coder-v4 — its KV cache at 32K context is 4.5x smaller, because of how its attention layers cache.

Model comparison

qwen3.5-4b-agentic-coder-v4 vs Qwen3-8B

At Q4_K_M, qwen3.5-4b-agentic-coder-v4 is the smaller download — 2,783,447,520 bytes against 5,027,783,488. At long context the gap widens: qwen3.5-4b-agentic-coder-v4's KV cache at 32K is 4.5× smaller, which usually matters more than the difference in weights.

From the file· summed bytes, KV per layer

Side by side

	qwen3.5-4b-agentic-coder-v4	Qwen3-8B
Parameters	4.7B	8.2B
Architecture	qwen35	qwen3
Layers	32	36
Native context	262,144	40,960
Mixture of experts	no	no
Quantizations published	42	51
Smallest quantization	1.82 GiB	2.12 GiB
Q4_K_M	2.59 GiB	4.68 GiB
Licence	apache-2.0	apache-2.0

KV cache by context

the term that decides long-context viability

Context	qwen3.5-4b-agentic-coder-v4	Qwen3-8B	Ratio
4,096	0.13 GiB	0.56 GiB	4.50×
8,192	0.25 GiB	1.13 GiB	4.50×
16,384	0.50 GiB	2.25 GiB	4.50×
32,768	1.00 GiB	4.50 GiB	4.50×
65,536	2.00 GiB	9.00 GiB	4.50×
131,072	4.00 GiB	18.00 GiB	4.50×