Are you talking about GPT-4 or ChatGPT GPT-4? The GPT-4 model hasn’t changed, and that was confirmed by developers at OpenAI a while back IIRC. But, ChatGPT is

Are you talking about GPT-4 or ChatGPT GPT-4? The GPT-4 model hasn’t changed, and that was confirmed by developers at OpenAI a while back IIRC. But, ChatGPT is always undergoing changes. I assume they have a layer or two on top of the model that is being trained with reinforcement learning.