xAI has closed an upsized Series E funding round, raising $20 billion and exceeding its original $15 billion target. The round drew participation from investors including Valor Equity Partners, StepStone Group, Fidelity Management & Research Company, Qatar Investment Authority, MGX, and Baron Capital Group, alongside strategic backers NVIDIA and Cisco Investments.
The capital will support xAI’s rapid expansion of compute capacity, including continued development of large-scale GPU clusters. By the end of 2025, xAI reported operating more than one million H100 GPU equivalents across its Colossus I and II data centers, forming the backbone for training and deploying its advanced AI systems. The company reported significant progress in 2025 across products and user growth. Its Grok 4 model series advanced reasoning and agentic capabilities through large-scale reinforcement learning, while Grok Voice enabled real-time, multilingual conversational AI across mobile applications and Tesla vehicles.
xAI also expanded multimodal offerings through Grok Imagine and deeper integration of Grok within the X platform, contributing to a combined reach of about 600 million monthly active users. Looking ahead, xAI confirmed that Grok 5 is currently in training and said the new funding will accelerate infrastructure buildout, product launches for consumer and enterprise markets, and ongoing research tied to its mission of advancing scientific understanding.