In the prior Assistant chats, there was always a little circular ℹ️ "I" button you could click on the bottom of each message that gave you information about the message generated, such as token count and cost. All that information seems to be gone from past chats in the new Assistant interface. I'm attaching a screenshot of the new interface menu, which only shows up on new chats created post new Assistant interface adoption, and a screenshot of a chat created prior to adopting the new interface, where the i button is missing. 
In the new assistant interface, I expected the ℹ️ "I" button to be preserved in some way for all messages, so we can have information about the cost of each generated message.
I checked this pane frequently, almost every message generated, to keep a running idea of what my expenses were. This is important for users because we have a limited budget available in our subscriptions, and I want to learn over time through example how my specific usage patters translate to real token usage.
