How to run Qwen3-8B locally

Qwen3-8B (Alibaba, 8.2B) has a calculated baseline of about 9 GB of VRAM at Q4_K_M. Actual fit depends on the exact build, runner, context, and overhead. If it fits, marginal compute can be $0 on hardware you already own; electricity and allocated hardware cost are separate.

Three ways to run Qwen3-8B locally

1. Ollama — the one-liner

Auto-downloads a 4-bit quant and starts a chat — the simplest option.

ollama run qwen3:8b

First run downloads ~5 GB, then it can run offline. Electricity and hardware costs still apply. Get Ollama at ollama.com.

2. LM Studio — point-and-click

Open LM Studio, search “Qwen3-8B”, and choose a quant within your VRAM budget. The ≈9 GB figure at Q4_K_M is a calculated baseline, so leave headroom for context and runner overhead. Load it and chat offline. It also serves a local OpenAI-compatible API you can point Spanvero at.

3. llama.cpp — maximum control

Grab a community GGUF build of Qwen3-8B from Hugging Face (search “Qwen3-8B GGUF” — bartowski and unsloth publish reliable ones), then run:

./llama-cli -m <Q4_K_M-file>.gguf -p "Hello" -ngl 99

Or serve it with ./llama-server -m <file>.gguf for an OpenAI-compatible API on :8080.

Cost recap — full breakdown on the Qwen3-8B cost page

• On your machine: $0 marginal compute only when you already own the hardware; this excludes electricity and allocated hardware cost. Verify the ~9 GB calculated baseline against your exact build, context, and runner.
• No GPU big enough? Use your own API key at about $0.29/1M tokens, or rent a GPU by the hour on your own account. Full cost breakdown →

Rent a GPU on your own account: RunPod · Vast — you pay their normal price; disclosed referral links. How we stay honest.

License: commercial use OK.

Browse: Qwen3-8B cost · models for your GPU · all models

Open the free LLM cost calculator → to compare editable local, rented-GPU, and API assumptions.

Prices as of 2026-08-24. $0 markup, your own accounts, we never resell compute. © 2026 Cynosure LLC.