If you arrived looking for a ChatGPT rank tracker or an AI rank tracker, here is the honest version of what one can measure. There is no list of ten to hold position in — but there is something better defined, and you can track it properly.
How many of the runs named you, out of how many were collected. The sample size travels with the number, so you can tell 2 of 3 from 20 of 30.
Of the answers that named anyone in your category, what share named you. This is the closest honest analogue to a ranking, because it is relative.
The same prompts, the same engines, the same sampling, re-run on a schedule. Changes mean something because the method did not change underneath them.