➀ Elon Musk's xAI is upgrading its Colossus AI supercomputer from 100,000 to 200,000 NVIDIA Hopper AI GPUs; ➁ Colossus is the world's largest AI supercomputer, used for training xAI's Grok LLMs and chatbots for X Premium subscribers; ➂ The Colossus supercomputer cluster was completed in just 122 days, a feat recognized by NVIDIA CEO Jensen Huang.