it’ll go along and do it for a second, but then it’ll quickly wipe its message. That’s interesting because it suggests that the underlying model isn’t the same as OpenAI’s

Obviously I can’t speak to Bing’s claim on GPT4, but the behavior you saw does not necessarily have to do with the model. There are many ways the “chatbots” on the same model could behave differently, either by defining those behaviors programmatically or via context and prompts.