I pay for Pro and the newest model I have access for is still 3.6 Flash, which was released in July. I never got access to 3.7 and still don't have 3.8. Clearly this product is an afterthought, since I've heard many people have the same models available. Can you imagine if a bunch of the people who paid for ChatGPT still only had access to 5.5, with no communications from OpenAI about it?