Musk says Grok 4.6 coming next week with 1.5 trillion parameters

During SpaceX's Q2 2026 earnings call, Musk announced that Grok 4.6 will launch next week with 1.5 trillion parameters, focusing on improved fine-tuning and reinforcement learning. He also teased Grok 4.7, coming in 3-4 weeks, with 2.1 trillion parameters and better performance.