GPT-4o represents OpenAI's most advanced multimodal model, processing and generating text, audio, images, and video simultaneously through a single neural network. It matches GPT-4 Turbo's capabilities while offering enhanced performance in non-English languages, vision understanding, and audio processing.

The "o" in GPT-4o stands for "omni," highlighting its ability to seamlessly handle multiple input and output modalities in real-time, creating more natural human-computer interactions at half the cost of previous models.