research · open data
Measurements, not opinions
Everyone in this market has a view on how AI search works. These are the two things we can actually measure — one about the engines, one about ourselves — published in full, updated automatically, and free to quote.
- AI Citation IndexWhich websites ChatGPT and Perplexity actually cite for this market's questions. One fixed basket, measured every Monday, CC BY 4.0.read
- AI Content IndexHow often AI-written drafts pass an independent cross-vendor fact-check, what an article really costs by tier, and how many are rejected — live from our own ledger.read
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