xAI has completed an upsized Series E funding round, raising $20 billion and surpassing its initial $15 billion target, reinforcing strong investor confidence in its long-term AI vision. The round attracted major financial backers including Valor Equity Partners, Stepstone Group, Fidelity Management & Research Company, Qatar Investment Authority, MGX, and Baron Capital Group, alongside strategic investors NVIDIA and Cisco Investments, who are supporting xAI’s rapid compute and infrastructure expansion.
Also Read: VAST Data Unveils AI-Native Inference Architecture with NVIDIA for the Agentic AI Era
The funding caps a year of significant momentum in 2025, marked by the buildout of the world’s largest AI supercomputers at Colossus I and II with more than one million H100 GPU equivalents, major advances in the Grok 4 model series, and the launch of Grok Voice, a low-latency multilingual voice agent deployed across mobile apps and Tesla vehicles. xAI now reaches roughly 600 million monthly active users via Grok and 𝕏, while expanding multimodal capabilities through Grok Imagine. Looking ahead, the company is training Grok 5 and plans to scale new consumer and enterprise AI offerings powered by its growing infrastructure.