Developer finds AI visibility score was 25%, not 78%, due to flawed test method

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A studio owner published a claim in August that his business was mentioned unprompted in 14 out of 18 AI responses across ChatGPT, Perplexity, and Gemini — a 78% visibility score. The figure was later found to be inaccurate because all test prompts were entered in a single session, allowing the studio's name from some questions to bleed into the context window of others. After repeating the test with blind discovery questions and named fact-checking questions in completely separate browser sessions, the corrected score dropped to 9 out of 36 responses, or 25%. Further analysis revealed the studio was being surfaced consistently by only one of the three AI engines, despite all three having accurate facts about it when asked directly. The author now cautions that AI engines knowing a brand exists is not the same as choosing to recommend it unprompted, and urges strict session separation when measuring AI visibility.

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