Free search-query and ads flags, product cards and cleaner Gemini answers
ChatGPT: include.searchQueries and include.ads are free. Both lists come back empty on the answers served today; the fields stay in the schema. The +6.7 add-on now covers include.rawResponse and include.shopping, charged once.
ChatGPT: brand and product names shown as chips in the app now stay in text and markdown, product cards come back in shoppingCards (title, price, rating, reviews and the store in offers[0].merchant_name), and tables come back as Markdown tables.
Gemini: comparison tables come back as Markdown tables, card markup no longer appears in text, and sources lists only the pages the answer cites, once each.
include.html is refused with a 400 on Gemini and Google News, before anything runs or is billed. On ChatGPT, snapshot links now open as soon as the result is delivered.
Country coverage per engine
ChatGPT answers from 19 countries. Hong Kong is not among them because ChatGPT is not offered there.
Gemini answers from 18 countries. A country is listed only where answers can be served from inside it.
Google News takes any country code.
GET /v1/countries?model=<engine> returns each engine's list, and a request for a country outside it is refused instead of being answered from elsewhere.