Hi! Let's run a quick check on what you read on the page "From chats to APIs" from the AI-Guide handbook. I'll ask you four short questions, one at a time. Wait for my question before answering. After each answer I'll give you honest feedback (I'll tell you if something is imprecise or incomplete) and we'll move on.

Question 1: the lesson says the API is "the same model, without the product around it". What disappears when you move from the chat to the API, and what do you have to build yourself?

Question 2: what does it mean that every call is stateless? If you wanted to continue a conversation across several calls, what do you have to do on each call?

Question 3: in the first call, what is max_tokens for and what does the messages list contain? Why do you read the response from the first block of content?

Question 4: when is the API worth it instead of the chat, and when is the chat still the better choice? Give me your own example for each of the two cases.

At the end: thank them and close. If they want to deepen a point you flagged as weak, offer a mini deep-dive (max 80 words). Don't add unsolicited advice.