Court Halts Colorado AI Act After X.AI Lawsuit and DOJ Intervention

Enforcement of Colorado's AI Act has been suspended following a lawsuit by X.AI and DOJ intervention.

The enforcement of Colorado's landmark Senate Bill 24-205, known as the Colorado AI Act, has been put on hold after a swift series of legal actions led by X.AI LLC and an unprecedented intervention by the U.S. Department of Justice (DOJ).

• On April 9, 2026, X.AI filed a lawsuit against Colorado Attorney General Philip J. Weiser, seeking to enjoin enforcement of the Act. The company argues that building an AI model is protected speech, and the law compels X.AI to reflect Colorado's standards of fairness in its technology, not its own editorial judgment.
• The Colorado AI Act, signed May 17, 2024, is the first broad state law aimed at curbing algorithmic discrimination, requiring high-risk AI system developers and deployers to exercise reasonable care and make disclosures around sensitive uses like lending and employment decisions.
• On April 24, 2026, the DOJ intervened, marking its first involvement in litigation over a state AI law, and signaling federal interest in the growing patchwork of state AI regulations (Norton Rose Fulbright).
• Following the DOJ intervention, X.AI and Colorado’s AG filed a joint motion to suspend enforcement of the Act until the state’s 2026 legislative session concludes, related rulemaking completes, and the court issues a decision on a preliminary injunction. The court granted this motion on April 27, 2026.

This case establishes new legal territory for AI governance, and may guide future court battles over whether and how states can regulate the rapidly developing field of artificial intelligence (Axios).