When you're trully open source, you can make ethings like this:

Today we introduce OLMoTrace, a one-of-a-kind feature in the Ai2 Playground that lets you trace the outputs of language models back to their full, multi-trillion-token training data in real time. OLMoTrace is a manifestation of Ai2’s commitment to an open ecosystem – open models, open data, and beyond.

https://allenai.org/blog/olmotrace

you can do these same, except you would need to be a pirate website. It would even be better. except illegal. but it would be better.

That is why the others can't provide stuff like this. RAG/Hallucination check. I just wish Allen.AI models had bigger context, 4k is too small nowadays.