Oh that! when it stop thinking, you can try to make another account on Open AI API because I also have the same problem yesterday, after I make another account it work for me, the reason why its stop thinking because the Account Open AI API its actually a belling pay or to continue to pay something like that I guess, but I don't know I haven't pay yet I start to make another account so I can continue playing, hope this help because I don't have any option.