result.inlineProducts when you opt in with include.shopping: true (+2 credits on the base cost). For use cases, pricing context, and copy-paste examples, see the ChatGPT shopping API page on the product site.

Inline products in ChatGPT
Inline products currently appear only when ChatGPT uses the
gpt-5-3 model. ChatGPT picks the model per request, so they may be absent from a response even with include.shopping: true.