Elon Musk says Grok 4 is still smarter than GPT-5, vows Grok 5 will ‘crush’ competition

Soon after the GPT-5 launch on Thursday, xAI CEO Elon Musk went on the offensive and stated that his company’s Grok 4 Heavy model still outperformed the new model running ChatGPT. Musk, who had unveiled the Grok series of models last month, also claimed that Grok 4 Heavy was the “most intelligent model in the world”.

“Bottom line though: Grok 4 Heavy was smarter 2 weeks ago than GPT-5 is now and G4H is already a lot better,” Musk wrote in a post on X (formerly Twitter).

The billionaire also shared that the Grok 4 Thinking model still ranked above GPT-5…