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TechRadar

Eric Hal Schwartz

OpenAI o3 checkmates Grok in a chess showdown, and it wasn't even close

Grok OpenAI Magnus Carlsen David Howell Elon Musk

Grok OpenAI Chess.

OpenAI’s o3 defeated Elon Musk’s Grok 4 at chess
Magnus Carlsen delivered biting commentary on the quality of Grok's logic
Grok 4 made repeated blunders, while o3 played steady

The AI chess tournament between OpenAI’s o3 model and xAI's Grok 4 invited plenty of speculation as a kind of proxy battle between the two companies and their respective CEOs. Any comparison to the days of Deep Blue and Bobby Fischer soon faded, though, as OpenAI o3 repeatedly wiped out Grok 4, winning four games in a row, accompanied by the derisive commentary of former world chess champion Magnus Carlsen and grandmaster David Howell.

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