It's perplexity.ai. I like it because it doesn't require an account and because it can search the internet. It's like microsoft's bing but slightly less cringe.
It's a proxy for a number of LLMs of choice, prompts anonymised before they're sent. A bit like how their search engine is anonymised Bing, or how their maps are anonymised Apple Maps. I'm happy with the service!
The answer is not real. The tool, on the other hand, is called Perplexity. It "understands" your question, searches the web, and gives you a summary, citing all the relevant sources.