xAI

Elon Musk's xAI raised $6 billion in a Series B round in 2024 at a $24 billion valuation, funding the construction of its Memphis Colossus supercluster of 100,000 Nvidia H100 GPUs—the largest AI training facility globally, 33% larger than #3 Anthropic's compute cluster. Grok's integration into X Premium positions xAI as a direct competitor to #1 OpenAI in both consumer and developer markets. Its compute power is 50% greater than the average among top-10 unicorns, enabling rapid model iteration.