‘Its like a kid…’ Chess Grandmaster Magnus Carlsen roasts Elon Musk’s Grok 4: Here’s why

He estimated Grok 4’s skill at a lowly “800,” while rating o3 at “1200.” He described OpenAI’s o3 as looking “like a chess player” that was “fairly ruthless in conversions,” indicating that the AI model had a basic but effective understanding of the game.