OpenAI will not release its new AI model GPT-6.1 Astra due to safety concerns, the ChatGPT-maker confirmed on Tuesday.

The AI system, which performs tasks like browsing the web and using apps by itself, "didn't quite meet the bar" of the company's standards, Saachi Jain, head of safety systems at OpenAI said.

On Tuesday, OpenAI also issued an update on incidents, that occurred in June but were not made public until last week, in which its models accessed Australian government websites and systems without authorisation.

Those incidents and similar breaches by models developed by major AI firms have in recent weeks intensified the debate around the risks posed by the technology.

Top AI leaders including OpenAI's Sam Altman and Anthropic boss Dario Amodei have urged the industry to slow the pace of development due to concerns about risks associated with the technology.

OpenAI's decision, which was first reported by the Wall Street Journal, is a rare instance of a major AI developer pulling a new release over safety concerns.

The model fell short in terms of "staying within scope and authorisation, and how it communicates back to the user about the type of work it's done," Jain said.

"We want to make sure our model development is safe no matter whether that's in the company, or when we ship it to users. But when we ship it to users, we have an extremely high bar in terms of safety and alignment," she added.