ClickUp AI works well for small tasks such as "create x task for me" or "when did x task get completed".
Asking it for anything more, expect it to fail.
I built out a project, with subtasks to outline "mini" projects within the larger effort. Each subtask also had a subset of subtasks for each "mini" project - all with due dates and descriptions.
I asked the AI to build a project plan based off of the data in the parent task.
It would begin to build out the project plan, outlining targets and due dates, then as you would think it's about to be completed, it would refresh the entire screen and start over again...again...and again...ultimately never completing the request and eventually it just gave up halfway through re-writing the plan.
The AI is ok, but not with larger requests.