Is Qwen3.8-27B or NVIDIA-Nemotron-3-Nano-30B-A3B-BF16 smaller?

Qwen3.8-27B is smaller at Q4_K_M: 15.66 GiB against 20.88 GiB.

Which uses less memory at long context?

NVIDIA-Nemotron-3-Nano-30B-A3B-BF16 — its KV cache at 32K context is 1.2x smaller, because of how its attention layers cache.

Model comparison

Qwen3.8-27B vs NVIDIA-Nemotron-3-Nano-30B-A3B-BF16

At Q4_K_M, Qwen3.8-27B is the smaller download — 16,810,714,336 bytes against 22,421,827,488. At long context the gap widens: NVIDIA-Nemotron-3-Nano-30B-A3B-BF16'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

	Qwen3.8-27B	NVIDIA-Nemotron-3-Nano-30B-A3B-BF16
Parameters	27.8B	31.6B
Architecture	qwen35	nemotron_h_moe
Layers	64	52
Native context	262,144	262,144
Mixture of experts	no	yes, 128 experts
Quantizations published	22	25
Smallest quantization	8.39 GiB	16.85 GiB
Q4_K_M	15.66 GiB	20.88 GiB
Licence	apache-2.0	other

KV cache by context

the term that decides long-context viability

Context	Qwen3.8-27B	NVIDIA-Nemotron-3-Nano-30B-A3B-BF16	Ratio
4,096	0.25 GiB	0.20 GiB	1.23×
8,192	0.50 GiB	0.41 GiB	1.23×
16,384	1.00 GiB	0.81 GiB	1.23×
32,768	2.00 GiB	1.63 GiB	1.23×
65,536	4.00 GiB	3.25 GiB	1.23×
131,072	8.00 GiB	6.50 GiB	1.23×