> That's not a reliable source or reference. Read the disclaimer at the bottom.

The "Always verify important details. Siri is an Al that may make mistakes." is the new version of "your mileage may vary".

Also, I get a similar message when using Gemini, OpenAI and Claude.

I own a "Standard iPhone" and an M1 Mac; these numbers track.

Yes, I'd sanity-checked the answer on my machine, which is 15.5 GB on iOS 27.2: https://imgur.com/a/XVT8rme

Not all of the space used by Apple Intelligence is downloaded model size, which explains the reasonable difference.