What is Share of Model and should AEO teams start measuring it?
I think Share of Model is going to become one of the more useful metrics in AEO, GEO and AI search visibility.
The idea is simple.
Share of Model measures how often a brand, company, product or expert is mentioned inside AI-generated answers compared to its competitors.
So instead of only asking
Where do we rank on Google?
The better question becomes:
How often does ChatGPT, Perplexity, Gemini, Grok or Google AI Mode mention us when users ask about our category? That is a very different visibility problem.
Traditional SEO is still important. Technical SEO, content quality, internal structure, schema, topical authority and backlinks still matter. But AI search adds another layer. A company can rank well in traditional search and still be almost invisible inside AI-generated answers.
This is where Share of Model becomes useful.
It can help answer questions like:
Does the model mention our brand at all?
Are we mentioned before or after competitors?
Are we described correctly?
Which sources seem to influence the answer?
Are we visible for informational queries, commercial queries or only branded queries?
Are competitors being recommended while we are missing completely?
The important part is that this should not be measured with one random prompt.
A better method is to create a fixed prompt set. For example, 8 to 12 real questions that a potential buyer might ask during research, comparison and decision-making. Then run those same questions across multiple AI platforms on a recurring schedule.
The goal is not to treat one answer as absolute truth. The goal is to see patterns over time.
For example, if your brand is never mentioned when people ask “best AEO agency for B2B companies” or “how to improve brand visibility in ChatGPT”, that is probably not just bad luck. It may mean the model does not have enough clear signals connecting your brand to that topic.
In my opinion, Share of Model works best when it is combined with qualitative analysis.
A simple percentage is useful, but it does not tell the whole story. A brand mention can be strong, weak, wrong, outdated or buried under competitors. The context matters.
That is why I would track at least:
Brand mentions. Competitor mentions. Position in the answer. Sentiment or framing. Source/citation patterns. Accuracy of the description. Query intent
This also connects directly to AEO and GEO work.
If the model does not understand what your brand does, you probably need clearer entity signals. If the model mentions competitors but not you, you may have a content gap. If the model describes you incorrectly, you may have a positioning or source consistency problem. If the model never cites your site, your content may not be structured or authoritative enough for answer engines.
I do not think Share of Model replaces rankings, traffic or conversions.
But I do think it fills a gap that traditional SEO tools do not fully cover yet.
AI search visibility needs its own measurement layer.
Curious how others here are approaching this.
Are you already tracking Share of Model or similar AI visibility metrics for clients or your own brand?
And if yes, are you measuring it manually with fixed prompts, using tools, or building your own tracking process?