AI share of voice — how to measure brand mentions in ChatGPT
Define AI share of voice, how TopMention calculates it across models, and how to track movement weekly without vanity metrics.
AI share of voice (SoV) is the percentage of answers — on a fixed shopper-prompt panel — that mention your brand.
Definition owner: What is share of voice?. Full measurement system: AI visibility methodology.
Formula
SoV = prompts where brand is mentioned / total prompts in the panel
TopMention also reports per-model SoV for ChatGPT, Claude, Perplexity, and Gemini, plus a blended figure.
Why a fixed panel matters
If you change the prompts every week, you cannot tell whether SoV moved because of your work or because the questions changed. We reuse the same category panel so movement reflects real change.
Browse public long-tail examples in /ask. Learn how panels are used in niche ops under /guides → prompt-panel / weekly-ops.
How to use SoV
- Benchmark competitors with the same prompts (competitive benchmarking)
- Read per-model gaps (multi-model strategy)
- Pair with technical readiness (high SoV with broken Shopping feed still leaves money on the table)
- Report with a scorecard, not screenshots
- Avoid vanity metrics (guide)
What SoV is not
- Google share of voice
- AI referral sessions alone
- “Brand sentiment” without a prompt panel