Is Qwen3.6-35B-A3B or Magistral-Small-2509-Vision smaller?

Magistral-Small-2509-Vision is smaller at Q4_K_M: 11.76 GiB against 19.71 GiB.

Which uses less memory at long context?

Qwen3.6-35B-A3B — its KV cache at 32K context is 8.0x smaller, because of how its attention layers cache.

Model comparison

Qwen3.6-35B-A3B vs Magistral-Small-2509-Vision

At Q4_K_M, Magistral-Small-2509-Vision is the smaller download — 12,621,946,560 bytes against 21,166,757,728. At long context the gap widens: Qwen3.6-35B-A3B's KV cache at 32K is 8.0× smaller, which usually matters more than the difference in weights.

From the file· summed bytes, KV per layer

Side by side

	Qwen3.6-35B-A3B	Magistral-Small-2509-Vision
Parameters	36.0B	24.0B
Architecture	qwen35moe	llama
Layers	40	40
Native context	262,144	131,072
Mixture of experts	yes, 256 experts	no
Quantizations published	61	16
Smallest quantization	8.77 GiB	8.09 GiB
Q4_K_M	19.71 GiB	11.76 GiB
Licence	apache-2.0	apache-2.0

KV cache by context

the term that decides long-context viability

Context	Qwen3.6-35B-A3B	Magistral-Small-2509-Vision	Ratio
4,096	0.08 GiB	0.63 GiB	7.99×
8,192	0.16 GiB	1.25 GiB	8.00×
16,384	0.31 GiB	2.50 GiB	8.00×
32,768	0.63 GiB	5.00 GiB	8.00×
65,536	1.25 GiB	10.00 GiB	8.00×
131,072	2.50 GiB	20.00 GiB	8.00×