# What is a context window in AI?

Source: https://cloudbrain.in/glossary/context-window
Last updated: 2026-11-10

A context window is the maximum amount of text — measured in tokens — that an AI model can consider at once, including the instructions, documents and conversation. It limits how much of a long specification, contract or report an AI model can read in one go.

## Why does a context window in AI matter for architects, engineers and contractors in India?

It limits how much of a long specification, contract or report an AI model can read in one go. Techniques such as retrieval let assistants work with document sets far larger than the window.

## What is an example of a context window in AI?

A 300-page tender is too long to analyse at once, so it is split into sections and the relevant ones are retrieved for each question.

## Where does CloudBrain come in?

Our [custom AI tools and agents](/services/custom-ai) service helps architecture, engineering and construction firms put this into practice. See the related terms below, or browse the full [AEC × AI glossary](/glossary).