Ollama is a free, open-source tool that lets you download and run large language models on your own computer with a single command.
It wraps the llama.cpp engine behind a simple command line and a local API, so open models like Llama, Mistral, and Gemma run fully offline on macOS, Linux, and Windows. For most people it’s the easiest on-ramp to private, local AI — no cloud account, no data leaving your machine. You pull a model, type a prompt, and start chatting.
ollama run llama3

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