On his 55th birthday, Musk has a warning for Sam Altman and Dario Amodei

On his 55th birthday, Elon Musk turned to X with a challenge for OpenAI's Sam Altman and Anthropic's Dario Amodei: starting next month, his AI team will ship a brand-new, trained-from-scratch foundation model every month through year's end.

First up is Grok 4.5, a 1.

5T-parameter model now in private beta that he claims rivals—or perhaps beats—Anthropic's Claude Opus.

A 2T model lands in August. ...