I resigned from Anthropic today — the whistleblower thread

I resigned from Anthropic today — the whistleblower thread · 2026-09-09 · primary

Themes: Closed vs. Open Split · Safety Debate

Every position this source takes

pacing-is-worth-attempting — this source asserts it

A coordinated slowdown is worth pursuing even at the cost of advantage, because uncoordinated speed is the greater risk.

, blog post the Sunday before: no AI company has "solved alignment and monitoring to a sufficient degree to continue responsibly scaling at maximum speed for much longer." / "I expect and hope for voluntary slowdowns to become commonplace until shared safety bars are established. And I believe that international coordination on future AI development needs to become a top priority for governments around the world." -

I resigned from Anthropic today — the whistleblower thread · 2026-09-09

I am optimistic about the potential for coordination. Warning shots like the Hugging Face attack have made pacing agreements between U.S. labs more viable. I don’t feel like we’re on track to prevent a global race, which may require costly actions such as a temporary ban on improving model capabilities.

I resigned from Anthropic today — the whistleblower thread · 2026-09-09

*60,613 likes · 3,936 reposts · 249 replies · 7,115,996 impressions*

I resigned from Anthropic today — the whistleblower thread · 2026-09-09

sovereignty-is-legitimate — this source denies it

Building national AI capacity on sovereign infrastructure is sound policy for smaller countries, not merely a way to sell deployments.

Accepting this race and entering the “endgame” is a hubristic gamble that should not be launched from a private company’s Slack. Attempting to speedrun alignment should require extraordinary confidence that there are no better trajectories available.

I resigned from Anthropic today — the whistleblower thread · 2026-09-09

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