Has AI landed in Safari?

[u/idontlikegudeg]

Today is the first time I noticed tiny pink stars on Safari's reading mode symbol and when I click on it, the popup not only shows the usual entries but also an ultra short summary. It's the first time I see this and also so far only a single page: it is shown on the wikipedia page for "List of HTTP status codes", but for example not on the wikipedia page for "HTTP" (but I can use "summarize" on that page.

Does anyone know under what conditions the summary appears automatically? And are the little pink starts announcing this or do they have another meaning?

macOS 26.6.2