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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…
