▸ AI/LLM · Search Engine Land
ChatGPT Thinking mode cites different brands, only 25.6% overlap
A Semrush analysis with Kevin Indig tested 100 prompts across 20 buyer journeys and found ChatGPT's high-reasoning mode behaves like a different search surface. It ran nearly five times as many web searches and only 25.6% of cited domains overlapped with minimal reasoning on the same prompts.
The bottom line: If you track AI visibility in only one reasoning mode you are seeing half the picture, so split your prompt tracking across reasoning levels before drawing conclusions.