Which needs less VRAM, Qwen3 Code Reasoning 4B or Qwen3.5 4B PTBR?

At BF16, Qwen3 Code Reasoning 4B needs 8.5 GB and Qwen3.5 4B PTBR needs 8.8 GB, so Qwen3 Code Reasoning 4B is the lighter option to run locally.

What is the difference between Qwen3 Code Reasoning 4B and Qwen3.5 4B PTBR?

Qwen3 Code Reasoning 4B is a 4B model from GetSoloTech (Qwen family), while Qwen3.5 4B PTBR is a 4B model from lucasmg09 (Qwen family). Compare their VRAM requirements above to see which fits your GPU or Mac.

Qwen3 Code Reasoning 4B vs Qwen3.5 4B PTBR

Side-by-side comparison of VRAM requirements, quantization, context length, and hardware compatibility.

Qwen3 Code Reasoning 4B

GetSoloTech · 4B

ChatCodeReasoning

Qwen3.5 4B PTBR

lucasmg09 · 4B

Chat

Specifications

	Qwen3 Code Reasoning 4B	Qwen3.5 4B PTBR
Parameters	4B	4B
Context	262K	—
Architecture	Qwen3ForCausalLM	—
License	Apache 2.0	Apache 2.0
Downloads	284	5.8K
Released	Aug 2025	Jun 2026

VRAM by Quantization: Qwen3 Code Reasoning 4B vs Qwen3.5 4B PTBR

Quantization	Bits	Qwen3 Code Reasoning 4B VRAM	Qwen3.5 4B PTBR VRAM
BF16	16.00	8.5 GB	8.8 GB

Verdict

Qwen3 Code Reasoning 4B needs less VRAM at BF16 (8.5 GB vs 8.8 GB), so it fits on smaller GPUs. Qwen3.5 4B PTBR is the more widely downloaded of the two.

Frequently Asked Questions

Which needs less VRAM, Qwen3 Code Reasoning 4B or Qwen3.5 4B PTBR?: At BF16, Qwen3 Code Reasoning 4B needs 8.5 GB and Qwen3.5 4B PTBR needs 8.8 GB, so Qwen3 Code Reasoning 4B is the lighter option to run locally.
What is the difference between Qwen3 Code Reasoning 4B and Qwen3.5 4B PTBR?: Qwen3 Code Reasoning 4B is a 4B model from GetSoloTech (Qwen family), while Qwen3.5 4B PTBR is a 4B model from lucasmg09 (Qwen family). Compare their VRAM requirements above to see which fits your GPU or Mac.