---
title: "Generative Engine Friendly (GEF): Definition & GEF Score"
description: "Generative Engine Friendly (GEF) is the measurable degree to which a page can be accessed, understood, trusted, and cited by generative engines — scored 0–100."
canonical: "https://geo.primesentia.ai/generative-engine-friendly"
pageType: WebPage
---

# Generative Engine Friendly (GEF): Definition & GEF Score

Generative Engine Friendly (GEF) is the measurable degree to which a page can be accessed, understood, trusted, and cited by generative engines — scored 0–100.

## Generative Engine Friendly

Generative Engine Friendly (GEF) is the measurable degree to which a page or brand can be accessed, understood, trusted, and cited by generative engines — quantified 0–100 by the GEF Score.

- **04**: Dimensions (Accessibility · Extractability · Authority · Citability.)

- **16**: Signals (Pre-registered on-page signals.)

- **0–100**: Scale (A predictor of citation rate.)

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**Generative Engine Friendly (GEF)** is the measurable degree to which a page or brand can be accessed, understood, trusted, and cited by generative engines — ChatGPT, Claude, Gemini, Perplexity — when composing their answers.

Where SEO produced search-engine-friendly pages to rank, GEO produces generative-engine-friendly pages to be cited. The **GEF Score** quantifies that property on a 0–100 scale, computed from the page itself — a predictor of [AI Visibility](/ai-visibility) (citation rate), not a record of it.


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## What the GEF Score measures

Four weighted dimensions, built from 16 pre-registered on-page signals. Accessibility acts as a gate — a page a bot cannot read caps the whole.

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## The GEF Score in practice

### How the GEF Score is computed

The score is computed from the page itself, never by querying an engine. Each of the 16 pre-registered on-page signals (OSF: [10.17605/OSF.IO/XCG7J](https://doi.org/10.17605/OSF.IO/XCG7J)) scores on the registered `0 / 0.5 / 1` rubric; each dimension is the registered-weighted average of its signals, and the four dimensions combine by weight — with Accessibility acting as a gate:


---

$$
\begin{aligned}
\text{base}_d &= 100 \times \frac{\sum (\omega_i \cdot g_i)}{\sum \omega_i} \quad (g_i \in \{0, 0.5, 1\}, \; \omega_i = \text{registered weight}) \\
\text{Sub}_d &= \text{clamp}(\text{base}_d, 0, 100) \\
\text{GEF} &= \frac{20 \cdot \text{Sub}_{\text{Acc}} + 30 \cdot \text{Sub}_{\text{Ext}} + 25 \cdot \text{Sub}_{\text{Auth}} + 25 \cdot \text{Sub}_{\text{Cit}}}{100} \times \text{gate}(\text{Sub}_{\text{Acc}})
\end{aligned}
$$

$$
\text{gate}(\text{Sub}_{\text{Acc}}) = \begin{cases} 1 & \text{if } \text{Sub}_{\text{Acc}} \ge 60 \\ \frac{\text{Sub}_{\text{Acc}}}{60} & \text{if } \text{Sub}_{\text{Acc}} < 60 \end{cases}
$$

A hard floor is applied: if all four AI bots are blocked AND there is no SSR/static HTML, the score is capped at $\le 25$ ("GEF-blocked").

A page AI bots cannot read caps the whole score — which is why Accessibility gates the rest.


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## Common questions about GEF

### What is Generative Engine Friendly (GEF)?

Generative Engine Friendly (GEF) is the measurable degree to which a page or brand can be accessed, understood, trusted, and cited by generative engines — ChatGPT, Claude, Gemini, Perplexity — when composing their answers.

### What is the GEF Score?

The GEF Score quantifies generative-engine-friendliness on a 0–100 scale across four dimensions — Accessibility, Extractability, Authority, and Citability — built from the 16 pre-registered on-page signals (OSF: 10.17605/OSF.IO/XCG7J). It is computed from the page itself, never by querying an engine, so it is a predictor of citation rate, not a record of it.

### How is the GEF Score different from an AI Visibility score?

Most AI scores measure realized presence — how often you are actually cited. The GEF Score measures the property instead: whether a page can be, and deserves to be, cited, computed without querying any engine. AI Visibility (citation rate) — the proportion of LLM answers that cite your domain — is the separate outcome the Score is built to predict.

### How do I improve my GEF Score?

Raise the weakest dimension first — Accessibility acts as a gate, so a page a bot cannot read caps the whole. Ensure AI-bot access and server-rendered HTML, structure content into self-contained answer-first passages, strengthen author and entity authority, and add citable units like FAQ blocks, definitions, and statistics. Prime Sentia audits each of the 16 pre-registered signals and prioritizes the fixes that move the number most.

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## Related concepts

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## Get your GEF Score

Run a free audit to score your pages across the four GEF dimensions and the 16 pre-registered signals — with the fixes that move the number most.