Apple Intelligence Storage

Well, my first question in 2+ decades. Running Sequoia 15.3.2 on an M3 iMac. Normally I had Apple AI disabled but decided to enable it again. What I didn't expect is the storage difference. My available storage went from 852 GBs to 768GBs. I thought I read Apple AI is supposed to use 7 GBs. Obviously 84 GBs is not the same as 7 GBs.

Any thoughts?