ChatGPT is the largest AI answer engine by user base. Citations.io tracks every brand mention, citation and competitor co-mention with a monthly AI visibility scan.
ChatGPT (ChatGPT's current models) uses a mix of its parametric training data and live web retrieval for queries that benefit from fresh information. For "best of" and comparison queries, it almost always retrieves - meaning the brands it names today can change tomorrow.
Category leaders typically see meaningfully higher mention rates than challengers on relevant prompts - see our methodology for how mention-rate benchmarks are derived. A low mention rate usually means ChatGPT rarely names you for the queries your customers ask, often because you're not present on its preferred source pool.

