Measurement without a frame produces slides. A frame has four columns: question (commercial, not editorial), system (organic Google, AI Overview, ChatGPT, Gemini, Perplexity), finding (named / sourced / wrong), priority (revenue, risk, effort).
The baseline needs a cap. Ten to fifteen questions per language is enough to start. A hundred prompts with no decision is theatre.
Errors matter more than hits. If the model puts you in the wrong city, service or price band, that is a knowledge problem - often on your own site or in stale directories, not "in the algorithm".
SOURCE/01 by GlasBox (Full) delivers that matrix plus a 90-day order. The free short check does less on purpose: one domain, three questions, three observations. Mixing the two misleads the buyer.
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Next step
GlasBox measures classic SEO and AI visibility separately. No ranking or mention guarantee. The free short check stays thin on purpose.
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