The "o" in GPT-4o stands for "omni," which is a prefix meaning "all" or "every." This represents the model's multimodal capabilities, allowing it to understand and process text, audio, image, and video inputs and provide outputs in text, audio, and image formats3.
The ChatGPT macOS app was first announced ahead of Apple's WWDC 2024 in June. The companies jointly announced integrations between OpenAI's chatbot and Apple's operating systems for iPhone, iPad, and Mac.
ChatGPT appears on the Mac screen as a chat interface overlaid on top of the screen when users quickly call it up using the keyboard combination of Option + Space after installing the new ChatGPT app. This allows users to access the AI chatbot with a familiar macOS keyboard shortcut.