OPENAI'S O3 CRUSHES GROK 4 IN FINAL, WINS KAGGLE'S AI CHESS EXHIBITION TOURNAMENT

Summary from the TLDR AI newsletter

OpenAI's o3 beat Grok 4 in the Kaggle Arena AI Chess Exhibition Tournament. Gemini 2.5 Pro defeated o4-mini 3.5-0.5 for the bronze medal. Grok appears to struggle with end games. o3 could understand the endgame much better and came up with better moves, eventually checkmating Grok.