What is the prior knowledge share? (GetAgents metric)
Last updated: 1 November 2026 · GetAgents measurement glossary
Short answer: The prior knowledge share is a GetAgents metric: the share of the brands ChatGPT recommends for a question that the model would also name without searching the web, from what it already learned in training.
Details
- Brands with a high prior knowledge share are recommended even when the web gives no fresh evidence; newer brands depend on search results.
- It shows whether a brand should invest first in being known (mentions across the web) or in being found (pages that answer the exact question).
- GetAgents measures it by asking the same questions with and without web search.
Türkçe: «Önsel bilgi payı» — ChatGPT'nin önerdiği markalardan, web'de aramadan da ezberden sayacaklarının payı.
This page is part of GetAgents' own measurement of how AI assistants read the web. Reference code for this definition: GA-4X1BL4.