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AI glossary

Context Window

A context window is the maximum amount of text an AI model can consider at one time, including your input, the ongoing conversation, and its own reply.

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In this guide

  1. 1What Context Window means
  2. 2Why Context Window matters

What Context Window means

An AI model can only "see" a limited amount of text at once, and that limit is the context window, measured in tokens. Everything in the current exchange - your prompt, any documents, the chat history - has to fit inside it.

Think of it like a desk of a fixed size. You can spread out only so many papers before older ones must be set aside. If a long conversation overflows the context window, the AI effectively loses track of the earliest parts.

Why Context Window matters

The context window sets a practical limit on how much information an AI can handle in one go. Knowing it helps you design tools that stay accurate.

It limits how much text or how long a chat an AI can handle
It explains why AI may forget earlier parts of a long conversation
Different models offer different context window sizes
Knowing it helps you design reliable, accurate AI workflows

Frequently asked questions

The AI can no longer see the oldest content, so it may forget earlier details. To stay accurate, you can summarize key points or restate important information later in the chat.

More AI terms

AI HallucinationWhen an AI produces information that sounds confident and plausible but is actually incorrect or made up.Zero-Shot LearningWhen an AI completes a task it was not given any examples for, relying only on its general training.Few-Shot LearningGuiding an AI by including a few examples in your prompt so it follows the pattern you want.Chain-of-Thought PromptingA prompting technique that asks an AI to reason step by step, improving accuracy on complex tasks.Prompt ChainingBreaking a task into several prompts where each AI step feeds its output into the next.AI AgentSoftware that uses AI to pursue a goal on its own - deciding the steps and taking actions to get there.

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