in GPT4 you actually give it an image input. Like a picture of sugar and ask it what can you make from this and it will answer pancakes or waffles and much more. GPT 3 can't
You can use GPT4 to write better code. It can even write a full website by itself and you just have to copy paste that code. It is way better than GPT3 in this matter.
GPT4 can write better stories and do less mistakes or no mistakes. If you read one of it's stories you will think that it is written by a human. Just Amazing