OpenAI has introduced a custom instructions feature for ChatGPT, which will be included in the free plan. Users can set custom instructions to specify what information ChatGPT should consider and how it should respond during conversations. This feature allows users to personalize ChatGPT's responses, enhancing work efficiency. Teachers can set their own writing styles within ChatGPT, and developers can work by specifying their preferred programming languages. Additionally, this feature eliminates the need for individual users to input repetitive information each time they shop, providing a better user experience. OpenAI emphasizes its respect for user privacy and the removal of potentially personally identifiable information before processing data. The feature will first be rolled out to paid users and will be available to all users within the next few weeks.