OpenAI reversed the change on Tuesday, allowing the previous model to be accessible by paid users, but the episode illustrates what researchers are calling “AI Psychosis,” where overly-pleasing chatbots exacerbate delusions and create a false sense of romantic love.

OpenAI's Greg Brockman said startups that connect large language models to real-world applications are still extremely valuable.

Current and former OpenAI employees plan to sell approximately $6 billion worth of shares to an investor group that includes Thrive Capital, SoftBank Group Corp. and Dragoneer Investment Group, in a deal that values the ChatGPT maker at $500 billion.

GPT-5 was met with lukewarm reception. OpenAI intervened with a personality change. Is that going to be enough?

Wedbush’s analyst Dan Ives downplayed the AI bubble that OpenAI’s Sam Altman claimed, but Altman sees some investors getting very burnt.

With new tools and greater autonomy, OpenAI's flagship AI chatbot is more capable, and potentially more dangerous, than ever.

The rollout was even messy enough to spill into betting markets. One 27-year-old day trader, Foster McCoy, pocketed $10,000 in just a few hours by wagering that Google’s Gemini would beat GPT-5 in a popularity contest.