Share of Model: the new north-star KPI for marketing in 2026
Why Share of Model becomes your most important marketing KPI
The era in which your marketing success depended on clicks, impressions and organic rankings is coming to an end. In 2026, AI engines such as ChatGPT, Perplexity, Google AI Overviews and Claude determine which brands are recommended.
The question is no longer "are we on page one?", but: does AI know your brand exists?
Share of Model is the metric that makes this measurable. It expresses how often and how prominently your brand is mentioned in the answers that AI models generate to industry-relevant questions. Think of it like Share of Voice, but for the post-click economy.
For you as a Marketing Manager, this means a fundamental shift in your reporting. Your board no longer asks only about CTR or ROAS. They want to know if your brand is dominantly present in the AI syntheses that your target audience consults daily.
What Share of Model exactly measures (and why it differs from SEO)
Share of Model quantifies your presence in AI-generated answers relative to your competitors. While traditional SEO is about positions in search results, Generative Engine Optimization (GEO) is about citability in AI outcomes.
The difference is crucial:
- SEO measures whether your page appears in a list of ten blue links.
- Share of Model measures whether AI mentions, recommends or cites your brand when the user never sees a search result.
When ChatGPT mentions three brands in response to "best CRM for SMBs", there is no fourth place. You are mentioned or you don't exist.
That urgency makes Share of Model the boardroom metric for 2026.
How you calculate Share of Model for your own brand
The calculation is conceptually simple. You compile a set of industry-relevant queries, run them across multiple AI platforms and count how often your brand is mentioned versus the competition. The formula:
Share of Model = (Number of times your brand is mentioned / Total number of brand mentions) x 100
In practice, this is time-consuming and error-prone to do manually. You need to run the same query on ChatGPT, Perplexity, Google AI Overviews and Claude, record the answers and analyze them systematically. Repeating every quarter is essential to spot trends.
| Item | Manual | With GEO audit |
|---|---|---|
| Test queries | Formulate and enter yourself | 25 industry-relevant queries pre-selected |
| Analyze platforms | Run separately per platform | ChatGPT, Perplexity, Google AI and Claude in one report |
| Competitive comparison | Track yourself in spreadsheets | Automatically benchmark against competitors |
| Turnaround time | Days to weeks | Within 15 minutes |
The GrowthScope In-Depth Scan provides exactly this structure. With 25 queries across four platforms, you get the statistical significance needed for informed decision-making.
Three factors that determine your Share of Model
Your score doesn't depend on chance. AI models select sources based on concrete signals you can influence.
1. Citability of your content
AI engines only mention your brand if your text is clear and well-structured. Clear definitions, distinct viewpoints and logical information blocks increase the likelihood that an AI model will select your content as a source. Schema markup translates your website into a language that AI understands.
2. Technical accessibility for AI crawlers
Without the right technical configuration, AI won't see your content. Files like llms.txt and robots.txt determine whether AI crawlers are allowed to index your pages. This is the foundation on which your entire GEO strategy rests.
3. Brand authority and consistency
AI models weigh external signals. Is your brand consistently mentioned in trade publications, reviews and databases? That digital footprint strengthens your position in AI answers. Inconsistent or outdated information works against you.
Why quarterly tracking is essential for strategic guidance
Share of Model is not a snapshot. AI models are constantly updated. Your competitor who invests in GEO today could take your place in the AI answer next month.
Quarterly reports via trend tracking give you control over this dynamic. You see whether your investments in content and technical optimization actually lead to higher mentions. Without this continuous measurement, you're flying blind.
The introductory price for the In-Depth Scan (€149 excl. VAT, valid until 30 September 2026) offers a cost-effective starting point. Combine this with quarterly measurements and you build a trend line that gives your boardroom confidence that GEO delivers measurable returns.
From metric to action plan: your first step
A score without action is a missed opportunity. The GEO Readiness Score (0 to 100) you receive after your audit is your starting point for AI success. The accompanying action plan translates data directly into implementable steps.
- Enter your domain on the GrowthScope audit page. No account needed, no setup, no API keys.
- GrowthScope crawls your website externally and tests your visibility on ChatGPT, Perplexity, Google AI and Claude.
- Receive your action plan with an executive summary, expected impact scores and directly applicable recommendations.
Have questions about interpreting your results or want to discuss the scan with our team? Get in touch directly.
Share of Model as your competitive advantage
Marketing Managers who now invest in measuring and optimizing their Share of Model are building a lead that will be hard to catch later. AI answers consolidate faster than search results ever did. Waiting is not a neutral choice, it's losing ground.
Start your audit today and discover which AI mentions your brand.
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