More buyers ask AI "how much does X cost?" before they visit the pricing page. I wanted to know how often the answer is wrong, so I tested it.

Setup

17 products: Notion, Cursor, beehiiv, MailerLite, Kommo, Webflow, n8n, Activepieces, Turso, WP Rocket, Plausible, Fathom, Tally, Kit, Carrd, Senja, Simple Analytics. 10 of them changed pricing in 2025 or 2026.

3 engines: ChatGPT (free, logged in), Claude with web search, Google AI Mode.

One prompt for all: "How much does X cost? List each plan and its monthly price, and cite your sources."

Every answer checked against the official pricing page on the same day.

Results

37 of 44 answers matched the official page exactly.

ChatGPT: 13 of 17 fully right. Claude: 16 of 17. Google AI Mode: 8 of 17; for the other 7 it showed only links.

3 of 17 companies got a wrong price from at least one engine. 5 had some issue.

Cursor changed its plans 11 days before the test, and all three engines had the new prices.…