GPT3 is a largest neural network every created by humanity (as of Dec 2020 atleast). It has 175 billion parameters, 4.6 million $ were spent in training it. It is a specific type of neural network called language model which can do different creative natural language processing tasks such as,
1) Write poems and essays, write news article
2) Convert english statement to an SQL query
3) Languge translation
4) Write code. (This sounds scary right?)