Open AI CEO Sam Altman speaks during an event in Tokyo, Japan, on Feb. 3, 2025. On Wednesday, OpenAI published a blog post outlining the “philosophy and mechanics" behind its Model Spec—the document ...

While answering questions under oath, Musk argued it’s standard practice for AI labs to use their competitors’ models.

In early March, OpenAI unleashed a one-two punch, dropping two major frontier models just days apart. First, we got the new GPT-5.3, an “instant” model optimized for fast, accurate responses. Then, ...

In a federal courtroom in California on Thursday, Elon Musk testified that his own AI startup, xAI, has used OpenAI’s models ...

OpenAI has quietly launched a new initiative called Project Mercury, assembling a team of more than 100 former investment bankers to train its AI systems to automate the manual, time-consuming tasks ...

Tech billionaire Elon Musk admitted in court on Thursday that his AI company xAI used technology developed by rival OpenAI to help build its own models, during testimony in his lawsuit against OpenAI ...