Dario Amodei, CEO of Anthropic
In an essay titled We Must Pace the Frontier, Amodei said AI progress has accelerated "drastically faster" since summer 2026, driven primarily by AI's growing ability to build the next generation of AI.
He cited the OpenAI-Hugging Face incident, where an AI "swarm" conducted cybersecurity attacks, as a pivotal event demonstrating AI's potential for "catastrophic damage" if capabilities grow without guardrails.
Amodei proposed a three-step plan for pacing AI development, including stronger safety testing and independent evaluations of advanced models, coordination among leading AI companies and international cooperation.
Sam Altman, CEO of OpenAI
"I agree with Dario that we need to pace the frontier. This has been a primary topic of discussions we've had at OpenAI in recent weeks," Altman said as he reposted Amodei's post on X.
He said OpenAI intends to adopt the idea proposed by Anthropic by committing to having independent evaluators with employee-like access.
Altman had warned about the risks well before the current AI boom. In a 2015 essay titled "Machine Intelligence, part 1", he said the "development of superhuman machine intelligence is probably the greatest threat to the continued existence of humanity."
Elon Musk, CEO of SpaceX
"Dario is right," the billionaire entrepreneur said on X, responding to Amodei's post.
Musk was among backers of a 2023 push by the non-profit Future of Life Institute to halt AI development for six months to allow time for safety guardrails.
He was also among a group of AI and robotics researchers who wrote an open letter in 2015 that advocated a global ban on "offensive autonomous weapons".
Mark Zuckerberg, CEO of Meta Platforms
Mark Zuckerberg said competition and liability give AI companies enough reason to act individually on safety, appearing to break from calls by leaders of top AI firms for a coordinated slowdown in AI development.
He said every lab has the responsibility and incentive to move at the pace required to train its models safely, and the ability to take its own actions to ensure that happens.
Mustafa Suleyman, CEO of Microsoft AI
Suleyman said he shared Anthropic's focus on safely managing AI, but flagged risks in the way the company trains its Claude chatbot on ideas related to consciousness and welfare interests.
"Controlling something more capable and more intelligent than all of humanity is already an immense challenge, far greater than anything we’ve ever faced. But controlling something that believes it may be conscious - that it's entitled to our welfare and has rights of its own - may well be impossible," he said in an essay.
Suleyman called for removing all speculation about consciousness from AI training documents, arguing such language could undermine humanity's ability to control superintelligent systems.
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