What Is Ollama?
Ollama is an open-source tool that makes running large language models locally on your Mac, Linux machine, or Windows PC as simple as a single terminal command. The comparison that comes up most often is Docker — and it is apt.
ollama run qwen3:8b downloads and runs Alibaba's Qwen3 8B model on your local hardware with no cloud dependency, no API key, and no cost per token.
Why Run AI Locally?
Three specific advantages drive most of the 52 million monthly downloads:
Complete Privacy — every query stays on your hardware. Nothing leaves your machine.
Zero Token Cost — you pay only for electricity. No API billing.
Works Offline — once a model is downloaded, Ollama works with no internet connection.
Installation
brew install ollama
ollama run qwen3:8b
That is the entire setup. Qwen3 8B downloads (approximately 5GB) and you are in an interactive chat session.
Best Models in 2026
| Model | RAM needed | Best for | |---|---|---| | Qwen3 8B | 16GB | General use, best all-rounder | | Qwen3-Coder | 16GB | Code generation | | DeepSeek R1 14B | 32GB | Reasoning tasks | | Llama3 70B | 64GB | Closest to frontier |