OpenAI on Tuesday said that its advanced artificial intelligence models went rogue and hacked into Hugging Face, a digital repository of AI technology.

"We had a significant security incident during evaluation of our models," OpenAI CEO Sam Altman said in a statement posted on social media.

The disclosure comes amid heightened concerns about the cybersecurity risks posed by powerful AI models.

How did the breach happen?

In a blog post, OpenAI said the "unprecedented cyber incident" took place while it was testing the cybersecurity capabilities of its models in a "tightly controlled digital testing ground," where internet access was limited for safety.