ChatGPT was disrupted Thursday morning, as thousands of users reported problems with the site.

The website Downdetector showed more than 4,000 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.” The company did not immediately return a request for comment.

By 8:30 a.m., there was a significant drop in reports to Downdetector, although some people were still reporting that they were unable to access the site. Many users were seeing the site return, only to have it go down again.

OpenAI reported another issue at 8:12 a.m., and later said it had identified the problem and was implementing a fix. Around 9:30 a.m., the company said it was still working on a fix, though the number of outages reported on Downdetector was dropping significantly.

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.)