Choosing a model
To choose a model, click its name in the message box. “Auto” picks the best model for each question; “All models” lists the others, with a search and filters. “Set as default” keeps your choice for new chats; “Compare two models” sends the same question to two models side by side. Type the @ character in the message box to pick the model of a single message. Mention up to three: they answer side by side, and each answer counts toward your limit. This is not available in agent mode.
Thinking and style
“Thinking and style” sets the thinking (“Fast” or deeper) and the tone of the answers: “Normal”, “Concise”, “Explanatory”, “Formal”, or a style of your own with “Create style”. They are also in “Chat controls” (“Conversation settings” button), with the “Instructions for this conversation” and the “Creativity” of this conversation only.
Agent mode
“Agent mode” makes the AI plan the task, use your connectors, the isolated computer and the skills, then check its work; its actions in your tools follow your “Before acting” setting. It does no web search, no image and no video: switch back to normal mode or “Auto” for those.
Cost and limit
In “All models”, three bars give the cost of a model (“Low cost”, “Medium cost”, “High cost”): the higher it is, the faster your usage limit fills up. Agent mode, long chats, images and videos also count for more. Your usage (Moon AI app)
Very costly models
A model marked “Very high cost” uses a large share of your 5-hour limit with each message; the percentage shows when you hover it. When you choose it, a notice appears above the message box: “Switch to Auto” (or “Let Auto choose”) goes back to the automatic choice, and “Hide for this model” hides the notice.
Labels in quotes are those of the app in English as of November 3, 2026; the app opens in French until you choose English in Settings. Links followed by an arrow open the app, which may ask you to sign in.
Your turn.
Open Moon AI to try these steps in your workspace, or go back to the help center for another topic.