The Context Window

Imagine answering a question while staring at a desk that can only hold a few sheets of paper at once. Anything you want to consider has to fit on that desk. Push a new sheet on and an old one slides off the edge. That desk is the context window : the model's

8 lessons, each with runnable code in the browser.

1. What the Context Window Is
2. What Counts Against It
3. When You Run Out
4. Managing Context
5. Counting Tokens Accurately
6. Context Window Sizes Across Models
7. Lost in the Middle
8. Long-Context Strategies

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