xAI Completing Training of 2 Trillion Parameter Grok Successor, Targeting August 2026 Release

What happened

On July 18, 2026, Elon Musk announced that xAI is completing the initial training run of a 2 trillion parameter model — the direct successor to Grok 4.5 (1.5T V9 foundation). General availability is targeted for August 2026.

Context and impact

A 2T model arriving shortly after DeepSeek V4 and GPT-5.6 Sol would make August 2026 an unusually dense month for frontier model releases. If the model maintains the latency and cost profile of its 1.5T predecessor, it would be a notable efficiency milestone.

Details

• Size: 2 trillion parameters (+33% vs Grok 4.5 / 1.5T V9)
• Training: wrapping up in the final days of July 2026
• Target release: August 2026
• Speed and token efficiency: planned to remain close to 1.5T predecessor
• Musk: model might be able to exceed Kimi (hedged statement)
• Grok 4.5 remains current production model