GPT-3, or Generative Pre-trained Transformer 3, is an advanced language processing AI developed by OpenAI. It can understand and generate human-like text based on the input it receives. With 175 billion parameters, it is one of the largest language models, allowing it to perform a variety of tasks, such as answering questions, writing essays, and creating conversational agents. GPT-3 is trained on diverse internet text, enabling it to generate coherent and contextually relevant responses. However, it does not possess true understanding or consciousness; it simply predicts the next word in a sequence based on patterns learned during training.