ChatGPT was named before anyone realised it would become so well known, and by the time it was it was too late. It's not like BERT is an amazing name either.

There used to be Bard but no one remembers it anymore (although this is a bit different, because Bard wasn't nearly as well known as Gemini).

I'm really curious if OpenAI wanted to adopt a different name at some point. Or maybe they hope that sometime in the future one of their products will supersede ChatGPT and everyday people will start using that new name for everything AI so maybe they aren't in a rush to rename ChatGPT itself to anything else.

But BERT's name led to some wonderfully named spinoffs like CamemBERT and FlauBERT for French, as well as ALBERT, RoBERTa, etc.