GPT-4o Advanced Voice, introduced in 2024, represents a groundbreaking development as the first native multimodal model capable of processing and generating audio directly, without the need for intermediate text conversion. This innovation allows the model to "hear" and "speak" audio, facilitating seamless and natural interactions with users. One of the most remarkable features of GPT-4o is its ability to achieve reaction times of less than 300 milliseconds, providing an almost instantaneous response that enhances user experience significantly. This capability not only improves the efficiency of voice interactions but also opens up new possibilities for real-time applications in various fields, such as customer service, virtual assistants, and interactive entertainment. By eliminating the text conversion step, GPT-4o sets a new standard for speed and fluidity in voice-based AI systems.