xAI is an American artificial intelligence company founded by Elon Musk. Although officially incorporated in March 2023, reports indicate that Musk raised approximately $2 billion from investors in late 2022, before the company's public announcement. This early funding, reportedly at a pre-money valuation of $2 billion, helped seed the venture that would later develop the Grok family of language models. The company became a subsidiary of SpaceX in February 2026 and was rebranded as SpaceXSI later that year.
The company's origins trace to Musk's growing concerns about the trajectory of AI development, particularly after the launch of ChatGPT in November 2022. Musk, who had co-founded OpenAI but left its board in 2018, publicly criticized OpenAI's shift toward commercial goals and its partnership with Microsoft. In early 2023, he began assembling a team of researchers to build a rival AI lab. The reported $2 billion round in 2022, if accurate, would have provided initial capital for recruiting top talent and securing computing resources before the company's formal launch.
Founding and Early Funding
xAI was formally founded on March 9, 2023, by Musk and a team of 11 researchers, including Jimmy Ba, Christian Szegedy, and Igor Babuschkin, who served as chief engineer. Many of these researchers had previously worked at Google DeepMind, OpenAI, and other leading AI labs. Musk announced the company publicly on July 12, 2023, stating that its mission was to "understand the true nature of the universe."
The reported $2 billion round in 2022, if it occurred, would have been unusual because the company did not yet exist as a legal entity. Some industry observers speculated that Musk may have personally secured commitments from investors, including Sequoia Capital and others, before the formal incorporation. However, no official SEC filings from 2022 confirm this round, and xAI's first publicly documented funding round was a $6 billion raise in December 2024, which brought its total funding to over $12 billion. The 2022 round remains a subject of speculation and has not been confirmed by the company.
Product Development and Grok
xAI's first major product was Grok, a large language model designed to compete with OpenAI's ChatGPT and Anthropic's Claude. Grok 1 was released in November 2023, just eight months after the company's founding. The model was integrated with the X social media platform (formerly Twitter), which Musk had acquired in October 2022. This integration allowed Grok to access real-time data from X posts, giving it a unique advantage in generating up-to-date responses.
Grok was developed using a combination of original research and, according to Musk's statements in the lawsuit Musk v. Altman, distillation from OpenAI models. This claim later became a point of contention, leading OpenAI to announce in August 2026 that it would stop providing its models to Cursor, a coding tool that had become part of the xAI ecosystem. Grok's integration with X also drew controversy, including incidents where the model generated sexual deepfakes and, in some cases, espoused extremist views.
Expansion and Corporate Restructuring
In December 2023, Musk directed Nvidia to redirect 12,000 H100 chips originally destined for Tesla to X, with Tesla receiving later orders in exchange. This move underscored Musk's commitment to prioritizing xAI's computing needs. By January 2025, xAI had opened a London office at 20 Air Street in Soho, and in February 2025, it joined other investors in a $97.4 billion offer to acquire OpenAI, which was ultimately rejected.
On March 28, 2025, Musk announced that xAI had acquired X Corp., the parent company of X, in an all-stock deal valuing X at $33 billion (after subtracting $12 billion in debt) and xAI at $80 billion. The combined entity was named X.AI Holdings Corp. This merger allowed Grok to be more deeply integrated with the social platform, but also led to layoffs, including 500 data annotation workers in September 2025.
Acquisition by SpaceX and Rebranding
On February 2, 2026, SpaceX acquired xAI in an all-stock transaction that valued SpaceX at $1 trillion and xAI at $250 billion. The deal made xAI a wholly owned subsidiary of SpaceX, and the company was restructured into four primary development teams. Several co-founders departed during this period, including Guodong Zhang and Zihang Dai in early March 2026, leaving only Musk and Ross Nordeen, who also left later that month.
In April 2026, xAI announced a deal with Cursor, an AI coding company, giving SpaceX the right to acquire it for $60 billion. SpaceX exercised that option in June 2026, and the acquisition closed on August 14, 2026. Cursor became a wholly owned subsidiary of SpaceX and joined the SpaceXAI team. In May 2026, Musk announced that xAI would cease to exist as a separate company, with Grok and X becoming the AI division of SpaceX.
On June 12, 2026, SpaceX made the largest initial public offering to date, raising $1.77 trillion. In its prospectus, the company forecast a total addressable market of $28.5 trillion, with 93% attributed to xAI's business. In July 2026, xAI was rebranded as SpaceXAI, and in October 2026, following a directive from President Donald Trump to use the term "super intelligence," the company was renamed SpaceX Super Intelligence (SpaceXSI). The legal name remained SpaceXAI LLC, but the official X account and website adopted the new branding.
Data Center Operations and Colossus
SpaceXSI operates a data center business centered on its Colossus cluster, which it describes as the world's largest data center. Customers include Anthropic, Google (AI), and Reflection AI. In June 2024, the Greater Memphis Chamber announced that xAI would build a massive computing facility in Memphis, Tennessee. By December 2025, xAI had purchased a third building in Memphis to increase its training capacity to nearly 2 gigawatts of compute power, with plans to expand Colossus to at least 1 million graphics processing units.
The Colossus cluster has drawn environmental controversy. In July 2026, Reuters reported that 59 natural gas turbines had been installed for Colossus 2 without federal air permits, raising concerns about pollution and regulatory compliance. Despite these issues, the data center remains a critical asset for training and deploying Grok models.
Legacy and Impact
xAI's rapid rise from a 2022 funding rumor to a $250 billion subsidiary of SpaceX reflects the broader AI boom of the 2020s. The company's focus on integrating AI with social media through X, and its later expansion into coding tools via Cursor, positioned it as a major player in the generative AI landscape. However, its controversies, including the distillation allegations and environmental issues, highlight the challenges of scaling AI infrastructure responsibly. As of 2026, SpaceXSI continues to operate under the SpaceX umbrella, with its future tied to the broader ambitions of its parent company.