ChatGPT was disrupted for several hours on Thursday morning, with thousands of users reporting difficulty accessing the chatbot before service was restored.

The website Downdetector showed thousands of reports of problems with the site, starting shortly after 6 a.m. Users trying to access the site instead saw an error message.

OpenAI, the company behind ChatGPT, reported on its website that the issue had been resolved, saying that between 6:33 and 7:23 a.m. Eastern, users had “experienced elevated error rates.”

But reports of outages persisted, and at 8:12 a.m. OpenAI reported another issue. The company later said it had identified the problem and was implementing a fix. Shortly after 10 a.m., the company said it had completed its fix, and ChatGPT seemed to be fully restored.

On Tuesday, President Trump announced a joint venture between OpenAI, SoftBank and Oracle to create at least $100 billion in computing infrastructure to power artificial intelligence. OpenAI’s chief executive, Sam Altman, was at the White House for the announcement.

(The New York Times has sued OpenAI and its partner, Microsoft, accusing them of copyright infringement of news content related to A.I. systems. OpenAI and Microsoft have denied those claims.)