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

After the GPT-5 launch, xAI CEO Elon Musk claimed his Grok 4 Heavy model outperformed it, asserting it was the smartest model. He announced Grok's updates and teased Grok 5's release before year-end,

Elon Musk has confirmed that Grok 5, xAI's next-generation AI model, is expected to launch before the end of this year, describing it as 'crushingly good.' This comes on the heels of the ChatGPT-5 release that brings better multimodal understanding and improved integration of Gmail and other services.