It all depends on how your bot is set-up. These are guesses on what could run up the cost. I would guess that the bigger the KB is the higher the cost since it has to search thru more information. If you have the summary agent on, it creates a summary and a transcript of the conversation. This is included as context to the Knowledge Agent. If you are using the translator agent and the personality there will be extra costs for them to rewrite your message. If the question is very long it will also add costs. You could use the hybrid method instead of just GPT-4. You can change them in the Knowledge agent. The costs of using GPT-4 are significantly higher than GPT-3.5