The big cloud services are easier to start with. But there are real reasons to do it yourself. Three of them.
Your data stays with you
What you type and what the model answers never leave your computer. Handy when you are working with personal notes, client documents, internal code, or anything you would not paste into a public website.
It works even when the cloud does not
The model file lives on your disk. If the company that made it shuts down, raises prices, or simply changes its terms, your setup keeps working. The model you download today still runs in 2030 if your computer does.
No surprise bills
Cloud AI charges per use. Local AI costs you the price of your computer, plus electricity. After the first month, the marginal cost of an extra question is essentially zero.