Qwen3.5-4B vs Qwen3.5-2B

Specs, VRAM requirements and download trends — updated 10 November 2026.

Qwen · A · Open weights

Params

4.7 B

Context

—

30d

5.3 M

apache-2.0 · commercial OK

Qwen · B · Open weights

Params

2.3 B

Context

—

30d

3.7 M

apache-2.0 · commercial OK

Specification comparison

Differences are highlighted; identical values are muted.

Specification	Qwen3.5-4B	Qwen3.5-2B
Parameters	4.7 B	2.3 B
Architecture	Qwen3_5ForConditionalGeneration	Qwen3_5ForConditionalGeneration
Context length	—	—
Licence	apache-2.0	apache-2.0
Commercial use	Allowed	Allowed
Languages	—	—
Downloads 30d	5,274,172	3,743,248
Downloads all time	57.2 M	22.3 M
Quantizations on the Hub	SAFETENSORS	SAFETENSORS
Gated	No	No
First seen on the Hub	2026-02-27	2026-02-28

Daily snapshots, last 90 days (13 Aug – 10 Nov)

8.1 M2.5 M

Qwen3.5-4B Qwen3.5-2B

On RTX 4090 · 24 GB · 8K context unless noted

Qwen3.5-2B · fp16 5.8 GB / 24 GB

✅ Runs comfortably

Qwen3.5-4B · fp16 11.5 GB / 24 GB

✅ Runs comfortably