Tesla CEO Elon Musk on Thursday challenged OpenAI's GPT-5 release by asserting his xAI's Grok 4 Heavy model was already outperforming it two weeks ago.

Expectations are high for the newest version of OpenAI’s flagship model because the San Francisco company has long positioned its technical advancements as a path toward artificial general ...

As OpenAI scales up revenue, infrastructure, and model complexity, GPT-5 is a test of whether the business can keep pace with its ambition.

If you think that means GPT-5 would have to offer some major improvements, you’re absolutely right.