You're probably aware, but they recently added the actual cost of used tokens on the Billing page. This is much better than the token count on its own.
What the billing page doesn't go into detail about is number of searches caused by The Assistant, number of FastGPT searches, and number of regular searches. I'm curious because I'd like to track my tendencies; whether I am slowly using AI more than search, or if it stays the same. And FastGPT is a grayzone.