AI & the web
Context window
The amount of input and output a model can consider within a particular interaction.
In everyday use
A long document can exceed the space available to a model.
What to keep in mind
It is not the same as permanent memory; limits vary by model.
Also searched as: context length
Further reading
Original explanation and example by Perspectism. Further reading may cover the wider subject, rather than this exact wording. Edition updated 7 October 2026.
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