A new study by AIBIX Lab, unveiled on August 6, reveals that brand rankings recommended by generative AI differ sharply from actual market share. Analyzing 715 brands across 30 categories in the food and beverage and franchise sectors, the study ran from July 20 to August 4, inputting identical consumer queries into ChatGPT, Gemini, Perplexity, and Claude. Among the 30 categories, the No. 1 brand differed across AI platforms in 20 categories, with only 10 brands achieving unanimous top rankings across all four AIs. AI models rarely cited official company sources, and 17.8% of the 715 brands analyzed were never mentioned. Notably, Haimyun, South Korea's top-selling protein drink, placed only fourth in the AIBIX ranking for the protein food category. In the franchise burger segment, Burger King scored highest in the AIBIX composite ranking despite the store-count order being Mom's Touch, Lotteria, Burger King, and McDonald's. Mega MGC Coffee, the coffee franchise leader by store count, ranked first on Gemini but fell to third on Claude, fifth on Perplexity, and seventh on ChatGPT, resulting in a composite ranking of fourth. The Coffee Bean & Tea Leaf and Tom N Toms tied for 11th place with 3.2 points each, while Caffe Bene ranked 15th.