xAI's Grok 4.6 Finishes Initial Training This Week at 2 Trillion Parameters

Elon Musk confirmed this week that xAI's next flagship model, Grok 4.6, is finishing its initial training run, scaling up from Grok 4.5's 1.5 trillion parameters to 2 trillion.

• Grok 4.6: 2 trillion parameters, up from Grok 4.5's 1.5 trillion
• Initial training expected to complete the week of July 20, 2026
• No official launch date yet, but a release as soon as August 2026 is plausible
• Musk says token efficiency and inference speed will stay close to the 1.5T model, not scale up with parameter count
• Framed explicitly against Moonshot AI's Kimi K3 (2.8T parameters), which Musk says costs roughly three times more per task

Better than our 1.5T in every way - Elon Musk, on Grok 4.6

xAI has not published benchmark numbers or a technical report, so how Grok 4.6 actually stacks up against Kimi K3 and other frontier models on coding and reasoning tasks remains unverified until it ships.