Pricing per resolution means you pay when the AI actually closes a conversation, not when it drafts a reply a person then sends. Definitions differ between vendors, so check what counts: whether the customer has to confirm, how long a conversation must stay closed, and whether partial answers count.
Prices are expressed in different ways. Weft charges $0.80 per conversation the Customer Agent resolves on its own and nothing for drafts handed to a person. Zendesk lists additional automated resolutions at $1.50 on a committed volume or $2.00 pay as you go. Plain’s Ari uses 100 credits per resolution. To compare like for like, convert each to dollars at your monthly volume; the seat cost calculator does this from public list prices.