Glossary · term140 of 202
primacy effect
The tendency of a model to recall information more reliably when it sits near the start of the context window, forming one peak of the U-shaped recall curve.
also written as primacy bias · primacy region
Related terms
lost in the middleA pattern where models recall information best when it sits at the start or end of the context window and recall it worst when it sits in the middle.view termrecency effectThe tendency of a model to recall information more reliably when it sits near the end of the context window, forming the second peak of the U-shaped recall curve.view term
At a glance
- cited by
- 2 posts
- categories
- 2
- first used
- jul 2026
Claude Is a Math Problem (And the Context Window Is the Equation)The Claude context window is an equation, not a chat. Why failed attempts anchor the output, where measured degradation starts, and when to clear and re-derive.
Every Model Release Ages Your SkillsClaude Code ignoring CLAUDE.md is often an aged file, not a model bug. See which instructions a release expires, and which lines to delete on day one.