Run Qwen3 4B on a VPS.
prices as of · Contabo as of · 254 of 524 plans fit, disk included · re-ranked daily
Punches at last year's 8B level; the best pick for a 4–8 GB plan. On a CPU-only VPS it needs about 5.1 GB of RAM: 2.5 GB of Q4_K_M weights, 1.1 GB of KV cache for an 8,192-token context and 1.5 GB for the OS and runtime. 254 of the 524 plans in our index fit and include a disk; the cheapest comfortable pick is HOSTKEY's vm.v2-mini · 4 vCPU · 8 GB at $7.58/mo, streaming an estimated 3.9–7.9 tok/s.
The cheapest VPS that runs Qwen3 4B is HOSTKEY vm.v2-mini at $7.58/mo, 8 GB of RAM against the 5.1 GB the model needs, checked 16 Sept 2026.
Best VPS plans for Qwen3 4B
ranked by estimated tokens/s per dollar, comfortable fits first
- 1runs comfortably~12–24 tok/s$20.78/moView at netcup ↗
- 2runs comfortably~5.9–12 tok/s$8.65/mochecked 10 days agoView at Contabo ↗
- 3runs comfortably~3.9–7.9 tok/s$6.35/mochecked 10 days agoView at Contabo ↗
- 4runs comfortably~3.9–7.9 tok/s$7.58/moView at HOSTKEY ↗
- 5runs comfortably~5.9–12 tok/s$11.70/moView at HOSTKEY ↗
- 6runs comfortably~7.9–16 tok/s$16.15/mochecked 10 days agoView at Contabo ↗
Speed = effective memory bandwidth ÷ active weight bytes (4 GB/s per shared vCPU, 6 per dedicated), shown as a band. Real numbers depend on the host CPU generation, AVX-512/AMX support and how noisy the neighbors are, so treat these as order-of-magnitude estimates.
RAM needed · CPU inference
5.1 GB
- weights · Q4_K_M
- 2.5 GB
- KV cache · 8K context
- 1.1 GB
- OS + runtime headroom
- 1.5 GB
Other quants: Q8_0 weights 4.3 GB (near-lossless, about half of F16); F16 8 GB. Comfortable = 20% headroom over the total.
Model card
- Size
- 4.02B parameters
- Context
- 40K tokens
- Kind
- chat
- Released
- 2025-04
- License
- Apache-2.0
Facts fetched from Hugging Face on 7 Sept 2026: exact GGUF file sizes, KV geometry from the GGUF header · 6,242,262 downloads.
Or buy hardware · 14 reference machines fit
all machines →- Raspberry Pi 5 (16 GB)16 GB · 17 GB/s · ~1.8–2.8 tok/s$305*= 40 mo of VPS
- GeForce RTX 5060 Ti 16 GB (card only)16 GB · 448 GB/s · ~97–148 tok/s$800*= 106 mo of VPS
- Mac mini (M6, 16 GB)16 GB · 153 GB/s · ~33–51 tok/s$899= 119 mo of VPS
- GeForce RTX 5070 Ti 16 GB (card only)16 GB · 896 GB/s · ~100+ tok/s$1,200*= 10+ yrs of VPS
- Mac mini (M6, 32 GB)32 GB · 153 GB/s · ~33–51 tok/s$1,299= 10+ yrs of VPS
- GeForce RTX 5080 16 GB (card only)16 GB · 960 GB/s · ~100+ tok/s$1,600*= 10+ yrs of VPS
Buy · per month
$8.78
$8.47 hardware + $0.31 power
Rent · per month
$7.58
HOSTKEY vm.v2-mini · 4 vCPU · 8 GB
Break-even
The Raspberry Pi 5 (16 GB) pays for itself after 42 months of replacing the VPS, and it streams an estimated 1.8–2.8 tok/s against the VPS's CPU-only pace.
* approximate: August 2026 US retail median rather than list price. Local speed = peak bandwidth × 0.7 efficiency (0.35 on CPU-only boards) ÷ active weight bytes; unified-memory machines are assumed to give models 75% of their RAM. GPU cards need a host PC that is not included in the price.
Frequently asked
- How much RAM does Qwen3 4B need?
- About 5.1 GB for CPU inference at Q4_K_M: 2.5 GB of weights, 1.1 GB of KV cache at 8,192 tokens of context, and 1.5 GB of headroom. Longer contexts need more KV cache (144 KB per token for this model).
- What is the cheapest VPS that can run Qwen3 4B?
- HOSTKEY vm.v2-mini · 4 vCPU · 8 GB (8 GB RAM, 4 vCPU) at $7.58/mo excl. VAT runs it comfortably as of 16 Sept 2026. HOSTKEY vm.mini · 4 vCPU · 6 GB at $5.93/mo is a tight fit.
- How fast will Qwen3 4B run on a VPS without a GPU?
- Roughly 12–24 tok/s on the top pick. Token generation is limited by memory bandwidth, because each new token reads all of the weights once. More vCPUs help, dedicated ones most, but a GPU or an Apple silicon machine is 10 to 50 times faster.