I have to say that I have never seen Microsoft shipping things this fast. Meanwhile, Google has just released a waitlist for AI chat, four months after ChatGPT's release https://news.ycombinator.com/item?id=35246260
Microsoft is using already released products. ChatGPT and DALL-E have been in beta for a while.
Bing was the first GPT-4 instance available (yes, ChatGPT was already out, but not using GPT-4, and even the direct interface from OpenAI was opened after Bing.)
BingChat had _a lot of_ issues on the start. And it was built by the same company that made GPT-3.
The GPT-4 in Bing Chat was fine-tuned by Microsoft themselves, which might its initially unhinged behavior. Only the ChatGPT+ GPT-4 was fine-tuned by OpenAI. Microsoft apparently just got the base model, and they have not as much know how regarding fine-tuning.