Musk says xAI's 2-trillion-parameter Grok 4.6 has finished initial training
xAI
Elon Musk announced that xAI's next large model, expected to be called Grok 4.6 and built with roughly 2 trillion parameters, completed its initial pre-training run the week of July 20, 2026, days after Moonshot AI released the 2.8-trillion-parameter Kimi K3.
Why it matters
Marks xAI's direct response to Chinese open-weight frontier models like Kimi K3, though post-training, safety evals and red-teaming reportedly still take xAI 4-6 weeks, so no near-term public release is confirmed yet.
Importance: 2/5
Notable frontier-lab capacity milestone but not a shipped release; media-only confidence caps significance.