PromptSharp › Glossary › Context Window
What is Context Window?
The context window is the maximum amount of text (in tokens) a model can consider at once — prompt plus its answer.
The context window is the model's working memory for a single request: everything you paste in, the system prompt, the conversation history, and the answer it generates all have to fit within it, measured in tokens. Exceed it and the oldest content is dropped or the request is rejected.
Bigger windows let you paste long documents, transcripts, or codebases and ask questions across all of them. But models can still lose track of details buried in the middle of very long inputs, so structure and the placement of key instructions still matter.
Frequently asked
What happens if I exceed the context window?
The model either truncates — silently dropping the oldest text, usually the start of a long conversation — or returns an error. Either way it can no longer 'see' the dropped content, so answers may ignore earlier details.
Does a bigger context window mean better answers?
It lets you include more source material, which helps. But models can still overlook details in the middle of very long inputs, so a focused prompt often beats dumping everything in.
Related terms
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