How we verify AI free tiers, allowances and offers

isaifree answers one question: is this AI product free right now, and how much. Every fact comes from an official page with its last-verified time; if the provider doesn’t say, neither do we.

Last updated 2026-10-06

  1. 01Official sources onlyPricing pages, docs, help centers, announcements and offer terms. No third-party articles or screenshots.
  2. 02Checked dailyWe revisit official pages every day; when a page can’t be read we say so instead of passing off old results.
  3. 03Unknown means unknownNot published, not verified yet, and may be outdated are kept separate — never written as “no”.
  4. 04Corrections in publicMistakes keep their original record, marked “Corrected”, visible in the change log.

What we record

Each product is recorded per surface (App, Code, API) and edition (China, International, Shared):

  • Free tier or not
  • Free allowance and unit
  • Reset
  • When exhausted
  • Eligibility
  • Region
  • Current official offers
  • End dates

What counts as verified

  • From the provider’s own pages;
  • The page was read successfully this time;
  • Traceable to the page’s own wording.

If the provider doesn’t say, neither do we. “Not published by provider” is never “no”, never “0”, never “same”, and never matches a filter.

Daily checks

  1. 1Open official pagesEvery listed page, once a day
  2. 2Extract factsAllowances, rules and end dates from the text
  3. 3CompareUnchanged ⇒ refresh the time; changed ⇒ record a change
  4. 4Review doubtsConflicts and big changes are marked under review first
  5. 5PublishWith source and last-verified time

Status badges

Under review
Official pages disagree or conditions are unclear
Expired per official terms
The official end date has passed
May be outdated
Not re-verified within its freshness window
Could not re-verify recently
The last check could not read the page
Verified
Verified within its freshness window
Human-verified
Confirmed by isaifree against the official page in addition to daily checks

Four kinds of unknown

Not published by provider
The official page does not give this value.
Not verified yet
We track the product but have no verifiable official information yet.
May be outdated
Verified before, not re-verified recently.
Edition not specified
The page doesn’t say which edition the rule applies to.

How verdicts are made

No scores, no rankings, no “better deal”. Credits are provider-specific units and are not comparable by size.

China and International editions

Each edition is verified against its own official pages and shown as published — no ratios, and one edition never fills in for the other.

Changes and corrections

Every verified change records before, after and when it takes effect. Mistakes are kept and marked “Corrected”, with a correction record.

  • Free allowance increased
  • Free allowance decreased
  • Free tier added
  • Free tier removed
  • Offer started
  • Verification required
  • Offer ended
  • Free access stops
  • Value not published
  • Extra reset
  • Rule changed
  • Incident compensation

What we never show

  • Codes, invite links, QR codes;
  • Estimates;
  • Scores, rankings or “best for” picks;
  • Copies or screenshots of official pages.

Data and citation

Everything is available through the free open API under CC BY 4.0 — attribute “isaifree (isaifree.com)”.

Cite as: isaifree. “How we verify AI free tiers, allowances and offers”. isaifree.com/methodology, last updated 2026-10-06.