To access GPT-4, you must complete the GPT-4 login process. Visit the official platform, such as OpenAI's website, and log in using your credentials. If you don’t have an account, you can create one easily. Once logged in, you'll have access to GPT-4's advanced features, which include generating text, answering queries, and assisting with a variety of tasks. The GPT-4 login provides you with secure access to one of the most powerful AI models, making it easy to use for both personal and professional needs.