Share of model voice is the AI-era version of share of voice: across all the answers AI engines generate for your category's prompts, the percentage that name your brand versus competitors.
How to measure it
Run a fixed panel of 30-50 buyer prompts through ChatGPT, Claude, Perplexity and Google AI Overviews weekly. Count brand mentions per answer. Your share = your mentions ÷ all brand mentions.
Why it beats rankings
A #1 Google ranking can sit under an AI Overview that never mentions you. Share of model voice measures what buyers actually read: the answer itself. It's the north-star metric of any GEO program.
Related terms
Paul-Marie is the founder of Readyt, the Reddit growth platform for SaaS. He has generated 16K€+ in pre-sales in 2 months using nothing but Reddit, and now helps founders turn Reddit threads into their #1 acquisition channel.
