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Methodology, diagnostics, and original research from LLMConquer on measuring visibility in ChatGPT, Perplexity, Gemini, and Google AI Overviews.
Twelve AI visibility platforms compared on a normalized cost: monthly price divided by included prompts × engines × refreshes per week. Prices checked 21 Aug 2026.
Work access, rendering, entity, corpus, competitive, prompt-fit, and freshness in order. Most ChatGPT invisibility is a configuration problem, not a content problem.
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A usable prompt set has 30–50 prompts, zero brand names in the core index, a frozen list, and more decision-stage questions than vanity branded queries.
The same prompt can return two answers ten minutes apart. Tools then diverge on sampling, geography, login state, provider path, and what they count as a mention. Compare trends, not one-day percentages.