Since Treechat is covering the cost of posting text on-chai…

Since Treechat is covering the cost of posting text on-chain thus far, what are the other costs for posting photos, videos, or other non-text attachments? Are they written to the blockchain? If not, will they be at some point in the future? Also, I haven't yet used the language or image model fuctions on here, yet. Are those costs also being covered by Treechat? And if not, is there a price list for each model? Did I miss the FAQ page somewhere if all these questions have already been answered? https://home.treechat.ai/quest/c37cabb2-396b-4354-8651-41288ce0bd83