How this course works
Watch real runs, play the model, fix agents live, write code.
Every run in this course is a real model. The Glass Box replays one step by step: who's acting, what the model saw, and what it cost. Press play, pause, or step through.
- model calls
- 1
- tool calls
- 0
- tokens in
- 170
- tokens out
- 21
- time
- 1.9s
Task My order A123 hasn't arrived yet. Where is it?
Model call 1. It read 170 tokens and wrote 21. It asked for a tool, so it isn't done.
get_order({"order_id":"A123"})
stop_reason: tool_use
Context window
170 tokens sent
- Your messages12
- Tool definitions124
- System prompt34
0.02% of the 10,48,576-token window. Every call sends all of it again.
Context window170 tokens sent
- System prompt34
- Tool definitions124
- Your messages12
In Be the model you get exactly the model's context and choose its next move. In the Agent Lab you change prompts and tools and run them live. Coding exercises run your Python on our servers; sign in to use them.
You'll need basic Python: variables, loops, functions and dictionaries. New to it? Take the free Python course first, then come back.