OpenAI recently announced that ChatGPT will stop using the GPT-4 model from April 30 and fully upgrade to the new generation of native multimodal model GPT-4o. For developers who use GPT-4 through the API, GPT-4 will continue to be available. Although the upgrade process may affect the usage habits of some users, in the long run, the performance improvement of GPT-4o will bring a better user experience.

OpenAI officially released GPT-4 on March 14, 2023. As one of its most advanced language models at the time, GPT-4 quickly became the focus of the industry with its powerful text and image processing capabilities and support for the 25,000-word input limit. However, according to OpenAI's latest announcement, GPT-4 will be completely removed from ChatGPT on April 30, 2025, and replaced by its upgraded version GPT-4o.

As the successor to GPT-4, GPT-4o has achieved significant technological leaps in many aspects. In terms of writing quality, GPT-4o outperforms GPT-4 in all aspects, especially when dealing with complex writing tasks. In the field of programming assistance, GPT-4o has shown higher accuracy and efficiency, and is better able to handle code generation and debugging. In addition, in the field of science, technology, engineering and mathematics (STEM), GPT-4o's reasoning ability has also been significantly enhanced, and it can handle professional problems more accurately.

In addition to performance improvements, GPT-4o has also made major breakthroughs in response speed and multimodal capabilities. The average response time of GPT-4o has been shortened from about 5 seconds of GPT-4 to 320 milliseconds, achieving almost instant interaction. In terms of multimodal capabilities, GPT-4o not only supports the processing of text and images, but also adds support for audio, and can process visual, auditory, and text information in real time.