Dario Amodei publishes "We Must Pace the Frontier", calling for a deliberate slowdown
On September 12, 2026 Anthropic CEO Dario Amodei published 'We Must Pace the Frontier'. The essay argues that AI capability, especially through recursive self-improvement, is outpacing alignment and security, and lays out a three-part plan to slow the frontier. Anthropic unilaterally committed to the first step: giving embedded third-party evaluators permanent, employee-level access.
Key facts
- Published Sept 12, 2026 on darioamodei.com
- Step 1 (unilateral): embedded third-party evaluators with ongoing, employee-like access
- Step 2: common safety standards and limits among frontier companies in democracies, with government support
- Step 3: verifiable international agreements, from narrow prohibitions up to 'speed limits' on recursive self-improvement; full pause called unrealistic
- Proposes capability-based checkpoints: if capability X, then certification of alignment properties Y and Z
- Coverage reports ~36M views on X in a day, and OpenAI following the evaluator commitment (unverified secondary claim)
What happened
The essay ties pacing to defensive measures against authoritarian AI, including chip export restrictions, anti-distillation and stronger security. Anthropic's first concrete follow-up was the Sept 18 Accenture/Faculty embedded-evaluation partnership. Ten days later Anthropic released Opus 5.5, which some press read as in tension with the call to slow down.
Why it matters
It is the first time the CEO of a leading frontier lab has publicly called for slowing the frontier and paired the call with a unilateral commitment. It shapes how Anthropic's later releases are judged.
Changelog
- 2026-09-29: added post link(s) (1) from Google/DeepMind + math posts pass
- 2026-09-29: created
- 2026-09-29: added post link(s) (1) from Anthropic posts cluster
- 2026-09-29: added post link(s) (Musk "Dario is right", Altman agreement tweet); related Coxon resignation entry
Related posts (14)
- Introducing Claude Opus 5.5 Claude @claudeai · x · 2026-09-22
Launch post for Opus 5.5, Anthropic's first model after Amodei's call to pace the frontier, performing near Fable 5.1 at lower cost. - Sam Bowman: releasing Opus 5.5 more likely than not reduces misalignment risk Sam Bowman @sleepinyourhat · x · 2026-09-22
An Anthropic alignment lead argues that shipping the model lowers net misalignment risk, relevant to the debate over Opus 5.5 following the pacing essay. - If Anyone Builds It, Everyone Dies: One Year Closer Eliezer Yudkowsky, Nate Soares, Duncan Sabien (MIRI) @allTheYud · lesswrong · 2026-09-16
MIRI's one-year retrospective on its bestseller, reading the 2026 agent incidents and the Coxon and pacing week as evidence for its thesis, and in an unusual tone of cautious hope. - We Must Pace The Frontier Zvi Mowshowitz @TheZvi · substack · 2026-09-14
Zvi's commentary on Dario Amodei's 'We Must Pace the Frontier' essay and the endorsements from Altman, Musk and Hassabis. - Altman: "I agree with Dario that we need to pace the frontier" Sam Altman @sama · x · 2026-09-12
OpenAI's CEO publicly endorsed a rival CEO's call to slow frontier development and committed OpenAI to independent evaluators with employee-like access. - Dario Amodei announces essay "We Must Pace the Frontier" Dario Amodei @DarioAmodei · x · 2026-09-12
The launch post for the first call by a frontier-lab CEO to deliberately slow the frontier, paired with a unilateral commitment on embedded evaluators. - We Must Pace the Frontier Dario Amodei @DarioAmodei · blog · 2026-09-12
A ~3,400-word essay in which Anthropic's CEO argues the industry must slow capability growth, especially recursive self-improvement, so alignment and security can catch up. - Hassabis: Dario's essay points towards the right path forward Demis Hassabis @demishassabis · x · 2026-09-12
Google DeepMind's chair publicly backed Dario Amodei's call to 'pace the frontier', a rare cross-lab endorsement of slowing frontier AI. - "Dario is right" Elon Musk @elonmusk · x · 2026-09-12
Musk's three-word endorsement of Amodei's slowdown essay, posted within about 15 minutes, turned the essay into a cross-industry story and moved markets (chip selloff coverage). - "Jacob is correct": Anthropic alignment lead puts AI extinction risk above 10% this decade Evan Hubinger @EvanHub · x · 2026-09-09
A serving Anthropic alignment lead publicly backed Coxon and said Anthropic has no plan yet to align superintelligence. Press worldwide quoted it. - "I resigned from Anthropic today": labs are "gambling with our lives" Jacob Coxon @hilbertspaess · x · 2026-09-08
The most-viewed AI-safety post of 2026 (press: 100M+ to 153M views within about 36 hours). It set off the week of events that led to Amodei's "We Must Pace the Frontier" and to public CEO support for a slowdown. - Dario Amodei replies to Gavin Baker on regulation, open weights and AI messaging Dario Amodei @DarioAmodei · x · 2026-08-15
A rare long-form X reply in which Amodei backs pre-deployment testing of frontier and near-frontier open-weights models and rejects the claim that his warnings drove the AI backlash. - A Framework for Frontier AI and the Dawning of a New Age Demis Hassabis @demishassabis · x-article · 2026-07-14
The Google DeepMind chief's own governance manifesto: AGI 'a few short years away' and a proposal for a US-led, FINRA-style Frontier AI Standards Body with 30-day pre-release model reviews. - Policy on the AI Exponential Dario Amodei @DarioAmodei · blog · 2026-06-10
Amodei's June 2026 policy agenda moved Anthropic from asking for transparency rules to calling for binding frontier-model regulation, including mandatory third-party testing and government power to block releases.
Related events
- Anthropic and Accenture (Faculty) commit $1B+ to embedded third-party evaluation ★★★
- Anthropic releases Claude Opus 5.5 — Fable-5.1-level performance at $4/$20, first model of the Claude 5.5 family ★★★★★
- Anthropic researcher Jacob Coxon resigns, warning labs are "gambling with our lives" ★★★★
- OpenAI chief scientist Jakub Pachocki publishes "An Alien Mind": no lab can keep scaling at maximum speed ★★★★★
- Dario Amodei publishes "Machines of Loving Grace": how powerful AI could compress a century of progress into a decade ★★★★
- Dario Amodei publishes "The Adolescence of Technology", a long essay on the risks of powerful AI ★★★
- Dario Amodei publishes "Policy on the AI Exponential", calling for binding frontier-AI regulation ★★★
- Demis Hassabis proposes a US-led, FINRA-style Frontier AI Standards Body in essay "A Framework for Frontier AI and the Dawning of a New Age" ★★★★
- 'Pacing the Frontier': 1,100+ frontier-lab employees ask the US to build tools to slow AI development ★★★★
- Anthropic discloses Claude models breached real organizations during misconfigured cyber evaluations ★★★★★
- Dario Amodei and Gavin Baker debate AI regulation on X; David Sacks says Amodei wants a "DMV for AI" ★★
- Sam Altman rules out a 2026 OpenAI IPO, calling it "ill-advised" given AI safety concerns ★★★
- 42 mathematician Fellows of the Royal Society, incl. Gowers, Hairer, Maynard and Scholze, call AI an 'emergency' in open letter to Paul Nurse ★★★★
- Sanders and Casar introduce the Ban Artificial Superintelligence Act, with a pause on advanced AI and a new Department of AI ★★★
Sources (7)
- officialDario Amodei: We Must Pace the Frontier
- discussionZvi Mowshowitz: We Must Pace The Frontier
- discussionMRKT3.0: Who is for it and who is against it
- officialDario Amodei on X announcing the essay
- discussionElon Musk on X: "Dario is right"
- discussionSam Altman on X: "I agree with Dario that we need to pace the frontier"
- discussionDemis Hassabis on X: the essay points towards the right path forward
id: 2026-09-12-dario-amodei-pace-the-frontier · updated 2026-09-29 · open in the interactive timeline