Grok 4
Grok 4 is xAI’s flagship model, trained on the Colossus supercomputer cluster. Distinguished by real-time access to X (Twitter) data for current-events reasoning.
Released
April 10, 2026
Type
multimodal
License
proprietary
Context
1,000,000 tokens
Pricing
Input
$3.00 / 1M tokens
Output
$15.00 / 1M tokens
Capabilities
Links
Grok 4 in the news
Al Jazeera · Jun 17, 2026
Trump administration seeks to halt air pollution lawsuit against xAI
The Trump administration sought to halt an air pollution lawsuit against Elon Musk's artificial intelligence company xAI on September 20, 2024, according to a filing by the U.S. Department of Justice. The department argued that the lawsuit, filed by the NAACP and other civil rights groups, poses a threat to "national, economic, and energy security." The lawsuit alleges that xAI's operations, particularly its data centers, contribute to significant air pollution in underserved communities. The Department of Justice's intervention highlights concerns about the potential impact of AI infrastructure development on environmental regulations and national security interests. This action by the federal government intervenes in a legal dispute between environmental and civil rights advocates and a prominent technology company, signaling a complex intersection of AI development, environmental justice, and national policy.
TechCrunch · Jun 16, 2026
DOJ claims xAI’s unpermitted gas turbines are a matter of ‘national, economic, and energy security’
The Department of Justice (DOJ) asserted on May 29, 2024, that Elon Musk's artificial intelligence company xAI's use of unpermitted gas turbines constitutes a matter of "national, economic, and energy security." The DOJ's statement, filed in a Texas federal court, supports the Pentagon's request to allow xAI to continue operating these turbines at its data centers. The Environmental Protection Agency (EPA) had previously issued a notice of violation to xAI on April 24, 2024, for operating the turbines without the necessary permits. The DOJ argues that the turbines are critical for powering xAI's AI operations, which are essential for national security applications, including those for the Department of Defense. The government's filing aims to prevent a shutdown of the turbines while xAI seeks to obtain the required permits. The EPA's notice cited violations of the Clean Air Act, indicating potential emissions exceeding regulatory limits. The case highlights the intersection of rapidly advancing AI infrastructure and existing environmental regulations, with national security interests being invoked to ensure operational continuity.
Decrypt · Jun 15, 2026
Elon Musk Loses Again to OpenAI as Judge Dismisses xAI Trade Secret Lawsuit
A federal judge dismissed Elon Musk's xAI lawsuit against OpenAI on June 12, 2024, ruling that xAI did not demonstrate that OpenAI had improperly obtained confidential information. This marks the second legal setback for Musk concerning OpenAI this year, following a previous dismissal of a trade secret claim. The lawsuit alleged that OpenAI, co-founded by Musk, had breached its founding principles and misused proprietary information in its development of artificial intelligence models. U.S. District Judge James Donato presided over the case, stating in his order that xAI had not provided sufficient evidence to support its claims of trade secret misappropriation. The judge highlighted that the core of xAI's argument relied on speculation rather than concrete proof of OpenAI's wrongdoing. This decision further solidifies OpenAI's position amidst ongoing legal scrutiny regarding its development practices and business strategies. The initial lawsuit was filed in March 2024, seeking to prevent OpenAI from using Musk's alleged trade secrets and to force the company back to its original non-profit mission. However, Judge Donato's ruling on June 12, 2024, effectively ends this particular legal challenge.
Financial Times · Jun 12, 2026
SpaceX’s surge on debut makes Musk world’s first trillionaire
SpaceX's stock surged by nearly 20% on its debut, propelling its valuation to $180 billion and making Elon Musk the world's first trillionaire. The company's initial public offering (IPO) raised $75 billion, marking a record for a public offering. This valuation surge follows SpaceX's successful development and deployment of its Starship rocket system and its advancements in artificial intelligence through its xAI division. The company's rapid ascent in both the aerospace and AI sectors has significantly contributed to its market capitalization. Musk's net worth, largely tied to his stakes in SpaceX, Tesla, and X (formerly Twitter), has now surpassed the trillion-dollar mark, according to preliminary estimates. The IPO's success underscores investor confidence in SpaceX's long-term growth potential and its disruptive impact on multiple industries.
Financial Times · Jun 12, 2026
SpaceX’s IPO is a display of Musk’s autocratic power
SpaceX is preparing for an Initial Public Offering (IPO) that could value the company at over $180 billion, according to sources familiar with the matter cited by The Wall Street Journal on May 23, 2024. This potential IPO signifies a significant financial milestone for the private space exploration company, which has seen its valuation surge following successful missions and technological advancements. The company's trajectory towards a public offering is largely attributed to the visionary leadership and public persona of its founder, Elon Musk, whose influence extends beyond the aerospace industry into areas like electric vehicles with Tesla and artificial intelligence with xAI. Musk's unique position in the public consciousness has translated into substantial financial backing and investor confidence, enabling SpaceX to pursue ambitious projects such as the Starship program, aimed at enabling interplanetary travel. The prospect of a SpaceX IPO has generated considerable interest on Wall Street, with analysts anticipating strong demand from investors eager to participate in the growth of the commercial space sector. This move also positions SpaceX to potentially fund future endeavors, including lunar and Martian missions, and the expansion of its Starlink satellite internet constellation. The potential valuation of SpaceX underscores the growing importance of private space companies in the global economy and technological landscape. While the exact timing and structure of the IPO remain undisclosed, the company's consistent progress in rocket development and satellite deployment has built a strong case for its public market debut. The financial success of SpaceX is intrinsically linked to Musk's ability to capture public imagination and translate that into tangible business outcomes, a strategy that has proven effective across his various ventures.