Good to know
What is a context window?
In one line
How much the AI can “hold in mind” at once.
The context window is how much text the AI can keep in mind in a single conversation — its short-term memory. If a chat gets very long, the earliest bits can fall out of view, like the top of a whiteboard getting wiped to make room. Usually it's far bigger than you'll need, so it rarely matters when you're starting.
Where this comes up