Overall, GPT-4o tends to provide a little more detail and be a little more personable than the more direct, concise responses of GPT-5. Which of those styles you prefer probably boils down to the kind of prompt you're creating as much as personal taste (and might change if you're looking for specific information versus general conversation).

After an outcry, OpenAI swiftly rereleased 4o to paid users. But experts say it should not have removed the model so suddenly.

For now, the changes should help placate users who felt frustrated by the sudden shift to GPT-5 and deprecation of OpenAI's older LLMs.

Sam Altman came under fire after replacing GPT-4o with GPT-5, and will now bring it back after overwhelming requests.

OpenAI’s GPT-5 aims to curb AI hallucinations and deception, raising key questions about trust, safety, and transparency in large language model assistants.

OpenAI released GPT-5, the long-awaited upgrade to the model which powers ChatGPT, Thursday. In typical OpenAI fashion, the release has included plenty of twists, turns, and drama.

OpenAI CEO Sam Altman said that he has taken notice of how attached some users have become to specific AI models.

On a call with reporters Wednesday previewing the new chatbot, Altman likened GPT-5 to a Ph.D.-level expert. The new chatbot is also "the biggest single step forward" that OpenAI has taken in worldwide accessibility, Altman said.