If you want to run AI models locally on your computer, Ollama for Windows makes it surprisingly simple. No cloud subscriptions, no data sent to external servers — just powerful language models running directly on your PC. Windows support arrived in late 2023, and the experience has been polished ever since.
What is Ollama?
Ollama is an open-source tool that lets you download and run large language models locally. Think of it as a package manager for AI models. You pull a model like Llama 3, Mistral, or Gemma with one command, and it runs on your hardware. No internet connection needed once downloaded. Your conversations stay completely private on your machine.
Can you run Ollama on Windows?
Yes. Ollama has a native Windows installer available at ollama.com. It supports Windows 10 and Windows 11. Both NVIDIA and AMD GPUs are supported for hardware acceleration. If you have no dedicated GPU, Ollama still works using your CPU, though response times will be slower.
How to Install Ollama on Windows 10/11
Step 1: Download the Windows Installer
- Go to ollama.com and click Download for Windows.
- Run the OllamaSetup.exe installer.
- Follow the prompts and let Windows Defender verify the file if prompted.
- Ollama installs and runs as a background service automatically.
Step 2: Install and Verify
- Open Command Prompt or PowerShell.
- Type
ollama --versionand press Enter. - You should see a version number confirming the install worked.
Step 3: Run Your First AI Model
- In your terminal, type
ollama run llama3and press Enter. - Ollama downloads the model automatically (about 4.7GB for Llama 3 8B).
- Once downloaded, type your message and start chatting immediately.
- To exit the chat, type
/byeand press Enter.
Best AI Models to Run with Ollama on Windows
- Llama 3 (8B) Meta’s general-purpose model. Needs 8GB RAM minimum.
- Mistral (7B) Fast and capable, great for coding tasks. Needs 8GB RAM.
- Gemma 2 (9B) Google’s efficient model with strong reasoning. Needs 8GB RAM.
- Phi-3 Mini Microsoft’s tiny but smart model. Runs on just 4GB RAM.
- CodeLlama Specialized for code generation and debugging. Needs 8GB RAM.
System Requirements
| Component | Minimum | Recommended |
|---|---|---|
| OS | Windows 10 (64-bit) | Windows 11 |
| RAM | 8GB | 16GB or more |
| Storage | 10GB free | 50GB+ free |
| GPU | None required | NVIDIA 8GB VRAM or AMD equivalent |
| CPU | Any modern x64 CPU | Intel Core i7 / AMD Ryzen 7 or better |
Common Issues and Fixes
Windows Defender Blocking the Installer
Windows SmartScreen may flag the installer as unrecognized. Click More info and then Run anyway. Ollama is safe — you can verify the installer hash on their GitHub page. This warning appears because the app is newer and not yet widely distributed.
Model Downloads Too Slow
Large models can take time on slower connections. Run the pull command overnight if needed: ollama pull llama3. Downloads resume automatically if interrupted.
GPU Not Being Used
Check that your NVIDIA drivers are up to date. Ollama uses CUDA automatically when detected. Run ollama run llama3 and look for GPU layers in the startup output to confirm acceleration is active.
Alternatives to Ollama for Windows
LM Studio Has a full graphical interface, easier for beginners who prefer GUI over terminal. Jan AI Another local AI app with a clean chat interface built on top of local models. GPT4All One of the earliest local AI tools, supports many models with a simple desktop app.
FAQ
Is Ollama free for Windows?
Yes, Ollama is completely free and open source. The models themselves are also free to download and use locally.
Does Ollama work without internet?
After you download a model, it runs entirely offline. No internet connection is needed during conversations.
How much RAM does Ollama need on Windows?
At least 8GB of RAM for 7B models. For 13B models you need 16GB, and for 30B+ models you need 32GB or more.
Can I use Ollama with a chat interface?
Yes. Install Open WebUI alongside Ollama for a ChatGPT-style browser interface running locally on your PC.
Does Ollama support GPU acceleration on Windows?
Yes, it supports NVIDIA GPUs via CUDA and AMD GPUs via ROCm on Windows.
Which Ollama model is best for Windows?
Llama 3 8B is the best starting point for most users. It balances quality and speed on typical Windows hardware.
Running local AI is just the beginning. Check out Ollama for Mac if you also work on macOS. For cloud AI tools on your desktop, see our guides on ChatGPT for PC, DeepSeek for PC, and Microsoft Copilot for PC.
