Methodology: how prices are checked

Prices checked Nov 3, 2026 · Updated Nov 3, 2026

Every figure comes from the vendor's own page.

How figures are collected

Every price and limit comes from an official vendor page (pricing pages, help centers and API docs). Each table row links to its source.
A script re-reads the vendor pages once a day. A number is never overwritten with nothing; a parse that fails sanity checks (for example plans out of price order, or input above output price) is discarded; changes over 50% are applied but flagged for review.
Changes are proposed as a pull request and reviewed before they go live.
Prose (feature lists, limit descriptions) is edited by hand from the same pages.

Status labels used on every page
Label	Meaning
checked <date>	The script read the figure from the vendor page on that date.
checked by hand <date>	The figure was verified manually on that date (for example free plans).
last verified <date>; vendor page could not be re-checked automatically	The vendor blocks automated requests (for example HTTP 403). The figure is the last verified value and is re-checked by hand.
no longer listed on the vendor's pricing page	The item disappeared from the vendor page. The last published rate is shown so you can see what it was.
Not published	The vendor gives no number. This is not zero.
Not stated	The vendor does not say whether a feature is included. This does not mean not included.

How vendors name their plans
Product	Sold as
Grok	The X Subscription (xAI), also bundles X app features
Gemini	Google AI Plus, Pro and Ultra
Older SuperGrok / X plans	Existing subscribers only

Exchange rates: ECB reference rates via Frankfurter (about 30 currencies) and Exchange Rate API (about 160 currencies), fetched live with a saved snapshot as fallback.
Tax: standard national consumer rates for digital services as of 2026-11-03, from Tax Foundation: VAT rates in Europe (Jan 2026), TaxID: VAT and GST rates by country 2026, VatInfo.org: VAT rates by country 2026.
US and Canadian tax depends on state or province, so set a custom rate. Business buyers with a valid VAT or GST number are often charged 0%. API prices are always shown excluding tax.

Each plan gets a 0-100 fit score, a weighted average of:

Unpublished factors are left out, not scored as zero. It measures fit, not quality.

Usage is only comparable inside one vendor. Across vendors, headroom is the plan's position on that vendor's own ladder, and you set how much it matters.
No quality or benchmark claims. The scores use published prices, usage multiples, model access, context and feature tables.
Unknown values (marked Not published or Not stated) are left out of a score. They are never counted as zero or as included.
Converted currency and tax follow the currency and tax rules above.

Page dates
Label	Meaning
Prices checked	Latest check of the figures on the page
Updated	Last time the facts on the page changed

What is tracked
	Covered
Vendors	ChatGPT, Claude, Gemini, Grok
Plans	Consumer, team, API rates
Not tracked	Microsoft Copilot, Perplexity, others