The complaint says OpenAI’s business practices violated Texas consumer-protection and children’s online-safety laws. Paxton said the company has a responsibility to warn users about risks associated with its platform, and said his office would seek to hold technology companies accountable under state law. The allegations have not been proven in court.

The lawsuit follows legal action filed last week by attorneys general in eight other states, who accused OpenAI of violating their states’ laws. The cases are part of a broader debate over how to regulate fast-growing AI products, while the federal government has taken a comparatively limited role, according to the available account of the litigation. The Texas case could add pressure on the company to address how it informs and protects users, particularly children.