Checkmate: OpenAI's o3 swept Musk's Grok 4 in an AI chess showdown.

Aug 15 (Reuters) - Current and former employees of OpenAI are looking to sell nearly $6 billion worth of the ChatGPT maker's shares to investors including SoftBank Group (9984.T) and Thrive Capital, a source familiar with the matter told Reuters on Friday.

OpenAI is reportedly exploring a major secondary stock sale that could see its current and former employees cashing out around $6 billion in

OpenAI released its first open-weight model in years. Analysts say it could narrow China's lead in the open-source AI race.

GPT-5 is OpenAI’s latest, and now flagship, AI model. This new version is now the default system for a range of AI chatbots. OpenAI says GPT-5 is much more intelligent that the previous GPT-4 mode, with major improvements in complex front-end generation.

The ruling is the latest twist in a court fight that has played out since last year, when Musk accused OpenAI of abandoning its founding purpose as a charity by accepting billions of dollars in

In March 2026, a jury will hear OpenAI's claims of a "years-long harassment campaign" by Musk via social media, press, and legal moves.

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.

A federal judge on Tuesday denied Elon Musk's bid to dismiss OpenAI's claims of a "years-long harassment campaign" by the Tesla CEO against the company he co-founded in 2015 and later abandoned before ChatGPT became a global phenomenon.

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,

Jigar Bhati, a software engineer at OpenAI, said building up work experience and finding an opening that matches it is key to getting hired.