ChatGPT, OpenAI's AI chatbot, has grown rapidly since its launch in November 2022, reaching 300 million weekly active users by late 2024. It has become a key tool for productivity, offering features such as essay writing, coding, and creative writing. OpenAI has rolled out significant updates, including the GPT-4o model with voice capabilities and the latest GPT-4.5, which enhances computational efficiency, reasoning, and emotional intelligence. GPT-4.5 is designed to provide intuitive and emotionally aware responses, improving its interaction with users. The chatbot's ecosystem has expanded with the development of Chrome extensions and integrations into macOS IDEs, broadening its usability. However, advanced features like GPT-4.5 are restricted to paid subscribers of ChatGPT Pro and Plus. OpenAI faces challenges, including competition from rivals like DeepSeek and Gemini, legal disputes over copyright infringement, and efforts to address safety, bias, and misinformation concerns in its models.