According to the article, GPT-5 is actually three models and they can be run at 4 levels of thinking. Thats a dozen ways you can run any given input on "GPT-5", so its hardly a simple product line up (but maybe better than before).
It's a big improvement from an API consumer standpoint - everything is now under a single product family that is logically stratified... up until yesterday people were using o3, o4-mini, 4o, 4.1, o3, and all their variants as valid choices for new products, now those are moved off the main page as legacy or specialized options for the few things GPT-5 doesn't do.
It's even more simplified for the ChatGPT plan, It's just GPT-5 thinking/non-thinking for most accounts, and then the option of Pro for the higher end accounts.
According to the article, GPT-5 is actually three models and they can be run at 4 levels of thinking. Thats a dozen ways you can run any given input on "GPT-5", so its hardly a simple product line up (but maybe better than before).