Elon Musk says 'Opus-class' Grok 4.5 is about to launch

Talk about jumping on the bandwagon at the very last minute.

On Wednesday, SpaceXAI CEO Elon Musk announced that the new version of the company's AI chatbot, Grok 4.5, will be released to the public on Thursday, July 9.

"Based on strong positive feedback from customers in our beta test program, @SpaceXAI will make Grok 4.5 available to the public tomorrow. It is an Opus-class model, but faster, more token-efficient and lower cost," wrote Musk in a post on X.

This Tweet is currently unavailable. It might be loading or has been removed.

The recently renamed AI/social networking/data-centers-in-space company is currently testing Grok 4.5 as private beta, while the stable version of the LLM is currently Grok 4.3.

Musk calls the new Grok "Opus-class" in reference to the company's competitor Anthropic, whose general-purpose model, Claude Opus, is currently at version 4.6. Anthropic's most powerful model, Fable 5, has only recently been reinstated for users after being pulled following an intervention from the U.S. government.

Meanwhile, OpenAI's powerful GPT-5.6 model is also launching on Thursday, following a short-lived launch ban from the White House.