GPT 4o is the latest generation of large multimodal language models developed by OpenAI, capable of handling text, image, and audio inputs, providing a highly interactive AI experience. It builds upon GPT 4 with added audio processing capabilities and offers faster response times and greater interactivity.

GPT 4o introduces audio input recognition, enhances real-time user interaction, and offers more advanced multimodal recognition technology. Additionally, it has improved response speeds and the ability to handle longer texts.

Users can access GPT 4o through OpenAI's API interface or directly use it in supported applications. Developers can obtain API access through OpenAI's official website and integrate GPT 4o into their applications.

GPT 4o was officially released on May 13, 2024. Since then, users and developers can start using this model for free, with gradual rollout to general users over several weeks.

Developers need to register on OpenAI's official website and apply for API access. Once approved, developers can start using the GPT 4o API for development and integration.

GPT 4o is offered as an API service and does not require downloading. Users can access GPT 4o's features through API calls or directly on supported platforms and apps, or download the desktop client for use.

Yes, OpenAI has announced that GPT 4o is free for all users, accessible via ChatGPT's official website. Both Plus members and regular users can use GPT 4o for free.

Yes, OpenAI has launched a desktop version of ChatGPT, providing users with a rich interactive AI experience. Installation methods can be referred to in the documentation provided by OpenAI.

GPT 4 mainly handles text and image inputs, while GPT 4o adds processing for audio inputs. GPT 4o also offers faster response times and more advanced multimodal recognition capabilities, as well as the ability to recognize and express emotions.

GPT 4o is suitable for applications requiring high interaction and multimodal input processing, such as virtual assistants, content creation, real-time translation, etc. Its high customizability also makes it an ideal choice for developers to optimize user experience in specific applications.