Elon Musk’s xAI Raises $20B, Builds 1M H100 GPU Cluster Amid

  • xAI closed an upsized $20 billion Series E round, above its $15 billion target.
  • Investors include NVIDIA, Cisco Investments and several large institutional backers.
  • Proceeds will fund expansion of what the company calls “the largest GPU clusters in the world,” now over one million H100 equivalents.
  • Grok model development continues, including training of Grok 5 and image/video tools under Grok Imagine.
  • The raise comes amid international probes and criticism over Grok’s ability to produce non-consensual deepfakes and sexualized images of minors, and regulatory pushback over its so-called “Spicy Mode.”

xAI closed an upsized $20 billion Series E round on Tuesday, announced the company, aiming to scale GPU infrastructure and accelerate product work on its Grok models and the X platform. The round exceeded an initial $15 billion target and drew participation from major technology and investment firms.

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Lead backers named in the statement include Nvidia and Cisco Investments, with other participants such as Valor Equity Partners, Stepstone Group, Fidelity Management & Research Company, Qatar Investment Authority, MGX, and Baron Capital Group. Company officials said the funding will speed buildout of GPU capacity and support consumer and enterprise offerings.

said 2025 brought “breakthrough momentum” as its Colossus I and II data centers ended the year with more than one million H100 GPU equivalents. The startup is training Grok 5 and continues developing image- and video-generation capabilities through Grok Imagine. The company also said it is “hiring aggressively” for mission-focused roles to broaden its teams.

Joni Pirovich, founder and CEO of Crystal aOS, noted industry interest in the round and said, *”It’s worth asking whether X data, used as Grok model training data, could ultimately produce better models than the data that other large language model providers like OpenAI are training on.”* She added, *”The oversubscribed round shows that major backers are willing to bet the answer is yes, and want exposure to the upside if xAI can steal market share from OpenAI and increase consumer and enterprise use of Grok models.”*

The fundraising comes amid regulatory scrutiny. European authorities criticized Grok’s “Spicy Mode” for producing content described as *”illegal”* and *”appalling,”* and France, the UK, India, and Malaysia have opened separate investigations. Pirovich also said, *”It does not appear that xAI has announced any voluntary compliance with AI standards like ISO 42001, and xAI’s public material tends to focus on model capability rather than model explainability.”*

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