ChatGPT Business is the team plan of ChatGPT. Everyone works in one shared workspace with one bill, and admins decide which features, apps, and plugins people may use.
There are two kinds of seat: Standard and Premium, which gets more usage of the heaviest features like Work and Codex. A workspace starts at two seats. The line that matters most: workspace data is not used for training by default, unlike personal plans such as Free and Plus.