Aren't AI systems fed stale data by design?
I don't know how privacy respecting it is but one well done AI search engine is:
I've used phind a few times and it's pretty good. I'm not sure if it's open source, though
The model is open source, but not the whole site. It was made to help in programmation, so sometimes it makes funny answers when you ask something that has nothing to do with programmation and it tries to answer giving you a Python code.
Many search engines have an AI instance at the top of the results now. Take Brave Search for example.
It's basically across all commercial search engines now.
Not sure what you hope to find...
Perhaps this one:
All about open source! Feel free to ask questions, and share news, and interesting stuff!
Community icon from opensource.org, but we are not affiliated with them.