How do I start a chat?

Press "New chat" at the top of the sidebar, pick a model in the model picker and type your message. Each model shows what one message costs, and badges tell you which ones understand images, can search the web, or work with your daily free credits.

Use the "+" button in the message box to attach files, and the "Search the web" switch (on models that can search) for up-to-date answers.