There isn't anything like that currently - The integration that's been announced/shown is more like the current fallback in Siri of "Would you like me to Google that for you?"
> With ChatGPT from OpenAI integrated into Siri and Writing Tools, you get even more expertise when it might be helpful for you — no need to jump between tools. Siri can tap into ChatGPT for certain requests, including questions about photos or documents. And with Compose in Writing Tools, you can create and illustrate original content from scratch.