Grok 4.6 and 4.7 detailed: 1.5T and 2.1T parameters, improved training

Details: Grok 4.6 (1.5T params, improved SFT & RL) releases around Aug 7; Grok 4.7 (2.1T params) follows weeks later, better in every way but slightly slower.

• Grok
• xAI
• 模型参数