Frontier Lab Employee Open Letter Calls For Being Able to Pace the Frontier

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• 1,224 frontier-lab employees signed “Pacing the Frontier,” asking the U.S. government to build the technical/governance tools needed to deliberately pace automated AI research if needed — not an immediate slowdown demand. Anthropic (546/5,567, ~9.8%) and OpenAI (350/10,473, ~3.3%) supplied the bulk of signatures; both companies also endorsed it institutionally. Named signers include Dario Amodei, Jack Clark, and Jakub Pachocki.
• Zvi calls the letter’s wording “masterful” for maximizing signatures without losing substance, carefully distinguishing “pacing” (preparing intervention capacity) from “pause” (acting now) — but flags it soft-pedals existential risk framing and offers no specifics on what the requested tools would actually be.
• Reads it as evidence that safety concern inside the labs is broader and deeper than previously visible, and that lab employees’ leverage to speak up diminishes over time — so the window to organize is narrowing.
• Takeaway: he raised his own confidence that humanity avoids AI catastrophe on the strength of this letter, while stressing government still needs to build actual state capacity (monitoring, transparency, chip-export enforcement) — the letter alone changes nothing operational.