Methodology
Every price, limit and free-tier fact comes from the vendor's own pricing or help page, rendered in a real browser. Each fact links to that page and shows the date we checked it.
If a vendor does not state a number (for example, an exact message cap), we say not published instead of estimating. Ambiguous page text is flagged as uncertain.
A detector fetches every source page daily, stores a normalized text snapshot and diffs it against the previous one. Candidate changes go to a review queue; only verified changes are published to the change log.
Prices are in USD and exclude tax. Regional prices may differ.
Free to cite. All data is CC BY 4.0: quote, embed or republish it with a link to AI Plan Tracker. Raw data: tools.json ยท changes.json. Spotted an error? Every fact links to its source and the date we checked it.