How are people measuring brand visibility in chatgpt in 2026?

Spreadsheet and patience, mostly. Fixed list of prompts, run them in ChatGPT once a month (fresh chat each time), and record three things for each: are we mentioned, where in the answer, and is our site cited as a source. There are paid trackers that automate it, but the answers change run to run, so read any single result as a sample, not a ranking.