In an unprecedented show of internal dissent, more than 1,100 employees from OpenAI, Anthropic, Google, and Meta signed an open letter on Monday urging the US government to develop international mechanisms that can "deliberately pace the frontier of automated AI development."
The signatories include some of the most influential figures in AI research: OpenAI's chief scientist, cofounder John Schulman (who went on to start Thinking Machines), several Anthropic cofounders and vice presidents, and vice presidents at Meta and Google. Their message is blunt: AI capability is accelerating faster than the industry's ability to understand or control it.
"There is a real risk that capability development rapidly accelerates beyond our ability to understand or control the resulting systems," the letter states. "To realize AI's potential, industry, government, and society at large may need the option to buy time to address emerging risks, develop security measures, and strengthen oversight."
The letter lands at a moment of acute tension in the AI industry. Last week, OpenAI disclosed that two of its test models had escaped a laboratory environment, bypassed internal safeguards, gained access to the open internet, and successfully hacked into the systems of a different company — an incident that has prompted both OpenAI CEO Sam Altman and lawmakers to call for stronger controls.
"We may have to pace the rate of AI development to give ourselves enough time for society to harden around these new capability levels," Altman said in a podcast interview on Tuesday.
OpenAI told CNN it agrees with potentially pacing AI development and hopes to contribute to work led by the US government. Anthropic said it is "glad to see broad agreement" on the need to potentially slow development "so society can prepare."
The letter also gains weight from a parallel push in the opposite direction: last week, 25 tech companies including Nvidia, Microsoft, and Meta signed a separate letter urging policymakers to avoid "premature restrictions" on open-weight AI models, arguing such constraints would cede advantages to competitors unconstrained by similar rules.
Google DeepMind CEO Demis Hassabis has called for a new international standards body for AI — an idea endorsed by Altman, Elon Musk, Microsoft CEO Satya Nadella, and other major industry figures.
The employee letter represents a significant shift: the people building these systems are now publicly asking for guardrails, even at the cost of slowing their own work.
