OpenAI o3 defeated Grok 4 in the final to win the Kaggle Game Arena Chess Exhibition Tournament 2025. The tournament featured eight leading Large Language Models competing in chess from August 5-7.

tournament included models from major AI companies including Google’s Gemini 2.5 Pro and Flash, Anthropic’s Claude 4 Opus, and DeepSeek R1. LLMs forfeited games after making four consecutive illegal moves.

Final Results:

1. OpenAI o3
2. Grok 4
3. Gemini 2.5 Pro
4. OpenAI o4 mini
5. Claude 4 Opus
6. DeepSeek R1
7. Gemini 2.5 Flash
8. Kimi k2

The Kaggle Game Arena Chess Exhibition Tournament 2025 was the inaugural event for Google’s new platform where AI systems compete in strategic games. GM Hikaru Nakamura provided live coverage on his Kick channel while IM Levy Rozman created daily recaps on YouTube for the three-day competition.