Few recent software releases have been as hyped as OpenAI’s launch of its GPT-5 model. “GPT-5 is the first time that it really feels like talking to an expert in any topic, like a PhD level expert,” said CEO Sam Altman in a recent press briefing.

The return of GPT-4o comes after what Altman described as OpenAI underestimating "how much some of the things that people like in GPT-4o matter to them." In an attempt to simplify its offerings, OpenAI had initially removed all previous AI models from ChatGPT when GPT-5 launched on August 7,

OpenAI has spent much of the past week since launching GPT-5 trying to address a user backlash. Plus: An interview with AI “godfather” and Nobel laureate Geoffrey Hinton. But