Context window
Definition
The maximum amount of text a model can consider at once, counted in tokens. Everything the system needs to reason about — instructions, retrieved documents, conversation history — competes for the same budget.
A larger window is not automatically better. Models attend unevenly across a long context, and material buried in the middle of a very large prompt is reliably used less than material at either end. Retrieving the right five pages beats pasting in five hundred.
For buyers this surfaces as a design question: does the proposed system search your knowledge base and pass the relevant part, or does it stuff everything in and hope? The first scales and stays accurate; the second gets more expensive and less reliable as your content grows.
Definitions are free.So is the audit.
Thirty minutes on a call, then a written 5-page plan inside 72 hours showing where this actually applies in your funnel — and what it is worth fixing first.