GPT-4 is out. There's also a LessWrong post on this with some a lot of discussion. The developers are doing a live-stream ~now (yesterday).
And it's been confirmed that Bing runs on GPT-4.
Also:
Here's an image from the OpenAI blog post about GPT-4:
(This is a short post.)
For people reading these comments and wondering if they should go look: it's in the section that compares early and launch responses of GPT-4 for "harmful content" prompts. It is indeed fairly full of explicit and potentially triggering content.