OpenAI’s o3 model emerged victorious in a recent AI chess tournament, defeating xAI’s Grok 4 in the final, intensifying the rivalry between the two companies. The competition, hosted on Google’s Kaggle platform over three days,

Elon Musk downplayed the loss, calling Grok’s earlier strong performance a “side effect” and stating that xAI had “spent almost no effort on chess.” The match result adds another public layer to the rivalry between Musk’s xAI and OpenAI, co-founded by individuals who once worked together.

Know how OpenAI's AI model defeated Elon Musk's Grok in a recent AI chess tournament, exploring the capabilities of modern large language models in strategic games.

The tournament saw models from Anthropic, Google, xAI and DeepSeek compete against each other to be crowned the top AI chess player.

Google's AI chess tournament ended Thursday with OpenAI’s o3 model sweeping xAI's Grok in four straight games.

OpenAI’s ChatGPT o3 has emerged victorious over Elon Musk’s xAI model, Grok 4, in the final of a Kaggle-hosted chess tournament aimed at finding the best chess-playing large language model (LLM). The three-day event featured general-purpose LLMs from multiple companies, rather than specialist chess engines, battling for the top spot.

A unique chess tournament brought together AI models from leading global tech companies, pitting consumer-ready systems against each other. The three-day event, hosted on Google-owned Kaggle, featured eight models from Anthropic,

OpenAI, the company behind ChatGPT, defeated Grok, owned by Elon Musk, in the a chess championship match of the greatest