What GPU do I need to run Qwen/Qwen3-4B-Base?
4.0B parameters, published in BF16. View on Hugging Face
Set up Qwen3-4B-BaseQwen3-4B-Base is published by Qwen on Hugging Face, with 1,876,075 downloads and 96 likes to date. It's a Qwen3ForCausalLM model built for text-generation, published natively in BF16.
VRAM required & cheapest live GPU fit
Required VRAM = weight size at each precision, plus a fixed overhead for KV-cache, activations, and fragmentation. Full formula and assumptions: methodology.
A GPU is only matched to a row if its hardware supports that precision, and the primary recommendation is always a single-GPU fit when one exists.
INT4 requires a quantized checkpoint actually published for this model, check its Hugging Face page before relying on this row.
Cheapest way to run Qwen3-4B-Base at its published (BF16) precision: 1× RTX 3080 on simplepod, at $0.070/hr per GPU ($0.070/hr total). Quantizing to FP8 or INT4 (rows above) can cost less, but requires a compatible quantized checkpoint to exist for this model.
Qwen3-4B-Base: common questions
Does Qwen3-4B-Base fit on a 12 GB GPU?
Yes. At BF16 it needs 9.0 GB of VRAM, so a 12 GB card holds it with 3.0 GB to spare. An 8 GB card is not enough for it at BF16.
What is the least VRAM Qwen3-4B-Base can run in?
2.2 GB, at INT4 (quantized), which fits a 6 GB card, against 9.0 GB at BF16. That row assumes an INT4 checkpoint has actually been published for this model, so check its Hugging Face page before planning around it.
Does quantizing Qwen3-4B-Base lower the GPU bill?
Yes. At BF16 the cheapest live fit is one RTX 3080 on simplepod at $0.070/hr. At INT4 (quantized) it drops to one RTX 3070 on simplepod at $0.050/hr, provided a quantized checkpoint exists for it.
Weight-to-VRAM math, the fit rules, and how live prices are normalized: full methodology.
More Qwen models
- Qwen3-0.6B (752M, BF16)
- Qwen3-8B (8.2B, BF16)
- Qwen3.6-35B-A3B-FP8 (36.0B, F8_E4M3)
- Qwen3.5-9B (9.7B, BF16)
- Qwen2.5-7B-Instruct (7.6B, BF16)
- Qwen3-VL-8B-Instruct (8.8B, BF16)
