xAI

xAI is Elon Musk's AI company, founded in July 2023 with the stated goal of "understanding the true nature of the universe" . Its founding team of 12 drew heavily from DeepMind, OpenAI, Google Research, Microsoft Research, and Tesla , with four Chinese researchers among the initial group: Yuhuai (Tony) Wu, Guodong Zhang, Greg Yang, and Zihang Dai . The company has moved aggressively on infrastructure—by early 2025, it reportedly built a 100,000 H100 GPU supercluster in 122 days, claiming the top spot globally for compute . xAI's first public model, Grok-1, was released as open source in 2023; Perplexity CEO Aravind Srinivas later criticized it as having "many redundant parameters," noting that the 300B-parameter model underperformed Mistral's 56B offering . The company has also recruited externally, including approaching open-source developer Wang Guan to work on model development using his OpenChat experience—an offer he declined, as 暗涌Waves reported, preferring to pursue alternatives to the Transformer architecture .