What is Ollama?
February 17, 2026
Think of Ollama as the “App Store” or “user-friendly launcher” for running Large Language Models (LLMs) directly on your own computer.
Usually, running powerful AI models like Llama 3 or Mistral requires complex coding environments and heavy configurations. Ollama bundles all that complexity into a simple tool that lets you get an AI up and running with a single command.
Why People Use It
- Privacy: Everything stays on your machine. Your data isn’t sent to a cloud server (like ChatGPT).
- Offline Access: You can chat with your AI even if your internet goes out.
- Cost: It’s completely free and open-source. You only “pay” via your computer’s hardware power.
- Speed: Because it’s local, there’s no network latency.
How It Works
Ollama manages “Model Files,” which are compressed versions of AI models. It handles the heavy lifting of talking to your GPU (Graphics Card) or CPU so you don’t have to.
| Feature | Description |
| Cross-Platform | Works on macOS, Linux, and Windows. |
| Library | Access a huge library of open-source models (Llama, Phi, Gemma, etc.). |
| API Support | Developers can connect Ollama to other apps they’re building. |
| Ease of Use | To run a model, you literally just type ollama run llama3. |
What You Need to Run It
Since the AI lives on your hardware, your computer needs some “muscle”:
- RAM: 8GB is the bare minimum, but 16GB+ is much smoother.
- GPU: Having a dedicated graphics card (like NVIDIA or Apple’s M-series chips) makes the AI respond significantly faster.
Note: Ollama itself is a command-line tool (text-based), but many people pair it with a “Web UI” (like Open WebUI) to make it look and feel exactly like ChatGPT.