OpenAI has launched a major upgrade to its ChatGPT Plus subscription users with the latest large language model (LLM) upgrade - the 'Creative Writing' feature of ChatGPT-4o. According to a brief statement from OpenAI on X (formerly Twitter), the upgraded model's writing capabilities are more natural and engaging, and can be tailored to user needs, enhancing the relevance and readability of the content. With this upgrade, ChatGPT-4o is considered to have reached new heights in the field of creative writing.