Context rot
The drop in a model's accuracy as its context window fills with long, stale, or irrelevant material. More context is not always better.
“After three hours the session hit context rot, so I started fresh with a summary.”
See also
Part of the Extended list
Context rot is on the Extended list: builder jargon, industry terms, and newer slang for when you want to go further. It entered common use around 2025.