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Coastline Metrics does not sell guaranteed ChatGPT placement or statistically powered market surveys — we run stable buyer prompt packs, label low-n honestly, and treat movement as meaningful only when provider, model, prompt pack, and date match on a verification rerun.
Coastline Metrics does not sell guaranteed ChatGPT placement or statistically powered market surveys — we run stable buyer prompt packs, label low-n honestly, and treat movement as meaningful only when provider, model, prompt pack, and date match on a verification rerun.
A small prompt set is useful for exploratory signal and prioritization. It is not a statistically powered survey of market visibility. We label counts and keep claims tied to what we actually ran.
Outputs depend on provider, model, and the exact prompt text. A different model or pack can produce a different answer without your site changing. That is why we store prompt, model, and date on every run — and why trend lines only count when those inputs match.
We do not guarantee rankings, mentions, or revenue. We ship prioritized public fixes and comparable verify reruns so you can evidence movement — or see that the signal did not move yet — under the same frame.