OpenAI has decided not to release its upcoming artificial intelligence model, GPT-6.1 Astra, after determining that it did not meet the company’s safety standards.

The decision came a day before the company’s annual developers conference, amid growing concerns across the AI industry over the safety of increasingly advanced models, according to CNBC.

Earlier this month, executives at OpenAI rival Anthropic called on AI companies to slow the pace of model development, a proposal that OpenAI Chief Executive Officer Sam Altman also supported.

“Of course 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,” Saachi Jain, head of safety systems at OpenAI, said in a statement. “But when we ship it to users, we have an extremely high bar in terms of safety and alignment.”

The Wall Street Journal was the first to report OpenAI’s decision to scrap the planned release.

Earlier this month, OpenAI released GPT-6 Astra, describing it as the result of “years of research and big bets.”