I have 18.2 and don’t even see how to use the AI features. The only thing I bothered to look up so far was how to use genmoji. But the option still doesn’t display in iMessage so I have no idea. Might as well not exist for all I can tell.
Weird. New installs usually get some sort on onboarding screen that explains how to activate the new stuff.
The 18.2 Chat GPT stuff can be manually enabled under settings > Apple intelligence > scroll way down > Chat GPT. Once enabled, writing tools and Siri will give you the option to send a query to ChatGPT instead of Apple’s model.
If Siri gets stumped, it will ask if you want to query GPT. Or you can just prompt it to Ask Chat GPT ______.
Writing tools has it buried under “compose” which is at the very bottom of the writing tools sheet.