I just read the entire technical report on GPT 4, not just the promotional hype. And boy does it have some interesting details. I have gathered the 14 extra details that you, or at least the media, may miss from the release. The last one is more than a little wild.

These include things like the training secrets, the cherry-picked bar exam stat, text-to-image breakthroughs, and some truly astounding safety checks.

https://cdn.openai.com/papers/gpt-4.pdf
https://www.bemyeyes.com/
https://arxiv.org/pdf/2104.12756.pdf
https://arxiv.org/pdf/2203.10244.pdf
https://chat.openai.com/chat?model=gpt-4
https://arxiv.org/pdf/2302.10329.pdf
https://www.alignmentforum.org/posts/Aq82XqYhgqdPdPrBA/full-transcript-eliezer-yudkowsky-on-the-bankless-podcast

(From Youtube)