Yes, just by signing up you get 30 message credits and 1 chatbot (400k characters). You can use these to test out chat tuesday and see if it works for you.

One AI response with gpt-3.5-turbo (the default) costs 1 message credit. One AI response with gpt-4 costs 20 message credits. You can change which model your chatbot uses in the chatbot settings. The difference is because gpt-4 costs 15x (prompt tokens) and 30x (completion tokens) what gpt-3.5-turbo costs on OpenAI.

One chatbot means a chatbot that contains specific data and can answer any question about this data. Even if it was created using multiple documents.

If your chatbot is private, only you have access to it. If you decide to make it public, anyone with the link will be able to interact with it.

Your message credits are renewed at the start of every calendar month regardless of when you subscribed. So if you subscribe on the 15th of March, your credits will be renewed on the 1st of April.