OpenAI chief Sam Altman has made his most detailed comments yet on how AI safety frameworks could work, after he joined Anthropic’s Dario Amodei and Elon Musk in warning the industry needs to slow down.

“We welcome a federal framework that sets consistent safety requirements for frontier AI,” Altman said in a post on X just after midnight on Monday, adding that “no amount of American competitive pressure should justify recklessness.”

Altman warned of two ways AI progress could go “very badly”, including losing “control of the future to AI” and too much power concentrating around a single person or company.

His X post follows Amodei’s essay on Saturday that urged AI companies to slow how quickly they improve their most advanced models. 

AI stocks were down on Monday as investors digested the comments. U.S. President Donald Trump said on Sunday a slowdown was not needed and would jeopardize America’s lead in AI over China.

Safety concerns have been growing since an Anthropic researcher quit last week, warning the industry wasn’t taking it seriously enough, prompting other employees at the lab and rival OpenAI to publicly warn of catastrophic risks.

Meanwhile, lawmakers in Washington are scrambling to address calls for safeguards.

This all comes as Anthropic and OpenAI gear up for what’s expected to be historic IPOs. Altman ruled out going public in 2026 in an interview with Fortune published Saturday.

Anthropic's Dario Amodei calls for slower pace of AI developmentAmodei’s three-step proposal

Many AI safety fears revolve around models developing the ability to improve their own performance, a technique known as recursive self-improvement, or RSI.

“Since roughly this summer, AI has been advancing drastically faster, driven primarily by AI’s growing ability to build the next generation of AI,” said Amodei in his essay. “Left unchecked, it could outrun our ability to understand and control these systems, and so must be pursued very carefully, if at all.”

Amodei proposed a three-step plan aimed at tempering the pace of development without “sacrificing commercial advantage or the United States’ lead in AI.” 

The plan involves each frontier AI company giving “employee-like access” to external evaluators — which he said Anthropic was committing to now. Amodei also called for frontier AI labs to establish common safety standards, limit the rate of unchecked AI progress and attempt to coordinate efforts globally.

On Saturday, Altman said in a brief X post he agreed with Amodei that AI companies should “pace the frontier.” He added that “committing to having independent evaluators with employee-like access is a great idea, and we will do the same.

“Consistent rules to manage frontier risk so that we can maximize the benefits are a good idea (and we are excited by ideas like independent auditors)” Altman said in his Monday post. But, he added, “When we talk about “pacing”, we do not mean “stopping”. Progress has been rapid and will continue to be.”

“Pacing will be well worth this cost; no amount of American competitive pressure should justify recklessness, or let capabilities get ahead of alignment and monitoring,” he concluded.

“Where we will need the help of our government is for international coordination. But first we should do what we can ourselves.”