Microsoft’s new Bing was using GPT-4 all along

Key Facts

When Microsoft announced the new AI-enabled Bing, which it built on top of OpenAI’s GPT models, neither company would confirm which version of GPT was being used beyond saying it was a next-gen version of the model that powered ChatGPT.
“We are happy to confirm that the new Bing is running on GPT-4, which we’ve customized for search,” Microsoft’s Yusuf Mehdi, the company’s corporate VP and consumer chief marketing officer, wrote in today’s announcement.
Image Credits: Microsoft When Microsoft launched the new Bing, there were plenty of rumors that it ran GPT-4 already, so this isn’t a huge surprise, but it is interesting to see that Microsoft was confident enough in the model to stake its reputation on it — and to pay the bills for this more complex model.
After a rougher start than the company probably anticipated (in part because the new Bing was prone to hallucinations), Microsoft quickly iterated on the new Bing in recent weeks and after placing a number of restrictions on it early on, the company is now loosening up again.