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.

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,

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.

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.

CNBC’s MacKenzie Sigalos spoke with Silicon Valley developers who say GPT-5 is outperforming rivals like Claude on coding, debugging, and design work.

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.

Sometimes, when datacenter computing does a paradigm shift, things get cheaper, like the move to RISC/Unix systems in the 1990s, and then to X86 systems

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