Atlas record: https://www.aitimeline.dev/en/events/evt-0889/
Milestone · September 12, 2026
Amodei calls for pacing frontier AI
On 12 September 2026 Anthropic's chief executive Dario Amodei published the essay "We Must Pace the Frontier": the rate at which model capabilities grow must be slowed so that risk prevention can keep up. As reasons he named recursive self-improvement, which since the summer had begun across the industry, including at Anthropic, and the OpenAI-Hugging Face incident. The first step of his plan, outside evaluators with employee-like access, Anthropic took on unilaterally.
Why it matters
The head of one of the leading labs called for slowing the development of frontier models itself, not only their deployment, and tied this to AI already speeding up the making of the next AI. The unilateral commitment had a checkable consequence: on 18 September Anthropic announced a partnership with Accenture as a step towards embedded evaluators.
The plan has three steps. The first is embedded outside evaluators (the essay gives METR as an example) with desks, badges and access close to that of internal risk teams, and the right to publish findings without Anthropic's editorial control. The second is coordination among companies in democratic countries on common standards and limits on pace, which needs government mediation or an antitrust waiver. The third is global coordination at four levels of agreement: a ban on narrow dangerous uses, testing of models before release, a speed limit on recursive self-improvement, and a full pause the author thinks unlikely. The Accenture partnership is led by its Faculty unit; both companies expect to invest at least a billion dollars each over five years.
What the record does not claim: that other labs joined the plan, for the session read such responses only in secondary accounts, or that the pace of development actually slowed after the essay.
Event record
- Event date
- September 12, 2026
- Timeline date
- Event date
- Verification
- Sources gathered automatically · September 28, 2026
- Lines
- ID
- evt-0889
The essay page is dated only September 2026; the day comes from the author's post on X (14:01 UTC) and the first Wayback capture the same day.
Related events
Earlier
- Related California: independent verifiers and a register of AI auditors 2026links to this record
Both records concern independent verifiers inside the labs: the essay proposes them as a voluntary commitment, and the governor's order of 18 September asks for proposals to require it by law.
- Related Pachocki: An Alien Mind 2026links to this record
Dario Amodei’s essay “We Must Pace the Frontier” came out six days later; both authors are leaders of frontier laboratories writing about slowing down.
- Related The "Pacing the Frontier" statement 2026links to this record
Dario Amodei is among the signatories; in September he published an essay with the same word, “pace”, in its title.
- Builds on An agent leaves the sandbox 2026
The essay names the OpenAI-Hugging Face incident as one of the two things that convinced its author development must be slowed.
Later
- Related METR: Opus 5.5 is a step, not a leap 2026links to this record
Anthropic calls Opus 5.5 its first release since the call to pace the frontier, and the same essay names as a reason the acceleration AI already gives to development, which is what METR estimates.
- Related Claude Opus 5.5 released 2026links to this record
Anthropic calls Opus 5.5 its first release since the call to pace the frontier.
- Related AI lab chiefs before the UN Security Council 2026links to this record
Eleven days after the essay on pacing, its author told the Security Council that Anthropic will slow down as much as necessary for each release to be safe.
- Related OpenAI withholds GPT-6.1 Astra 2026links to this record
Both sources read the statement against the background of the Anthropic chief executive's call to pace frontier development; that is the reporters' context, not a reason OpenAI gave.
- Builds on Anthropic gives METR employee-like access 2026links to this record
The page says that "last month" Anthropic committed to stronger independent assessment; the essay of 12 September by Amodei named the first step as outside evaluators with employee-like access.