What is an AI model under the hood? Basically, just layers of many matrices of numbers that get updated many, many times (matrices - remember linear algebra?). As we wonder at the power of modern AI tools, it’s great to get a tangible sense of what they are and what training a model really does.

This is a great 7 minute video from 3Blue1Brown that explains it with helpful visuals. If you want to go deeper, there is a YouTube series on this channel that has more details on each component.