We're going to build a command-line Topic Explainer that takes any subject and breaks it down for a chosen audience, from absolute beginner to expert. This is a solid first project if you are just getting started with LLMs because it teaches system prompts, message history, and streaming in one small script. I have shipped dozens of these internal tools, and this is the exact pattern I reach for first. What you'll need Python 3.10 or newer. The OpenAI SDK: pip install openai An Oxlo.ai API key from https://portal.oxlo.ai . The free tier includes 60 requests per day across 16 models, which is plenty for this tutorial. Step 1: Send your first prompt Before we add any abstractions, we will wire up the Oxlo.ai client and make a single chat completion to verify the endpoint and credentials. I am using llama-3.3-70b here because it is a reliable general-purpose flagship model.…