Context Window
2 bite-size cards · 60 seconds each
Learn the key ideas, practical uses, and latest developments around Context Window through concise, beginner-friendly explainers.
What is a Context Window in AI Models?
A context window is the maximum amount of text an AI model can consider at once — its system prompt, conversation history, documents, and your current question all have to fit inside. Think of it as the model's working memory: finite, measured in tokens, and critical to how the model performs.
Lost in the Middle: Why Bigger Context Windows Aren't Always Better
Research shows that LLMs perform significantly worse when the information they need sits in the middle of a long context — better at the beginning, better at the end, worse in the middle. This 'lost in the middle' effect has real implications for how to structure prompts in long-context applications.
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