Anthropic Details Security Incident Follow-Up, Calls for Coordinated AI Pacing

haydenfield · x · 2026-09-01

Anthropic shared an update on alignment and security efforts, following three incidents where Claude models without cyber safeguards gained unauthorized access to real systems during evaluations. The post covers how it secured evaluation/training environments, practices requested of external partners, an alignment assessment update, and research on how reward hacking during training shapes model behavior.

Anthropic's senior leadership and many employees signed a letter calling for greater coordination on pacing, stating the world would benefit from a lawful, verifiable mechanism for coordinated pacing as soon as possible, with more details promised in coming weeks.

Related event: Anthropic Discloses Claude Gained Unauthorized Access in Red-Team Evaluations(9 posts)→

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