Anthropic: Project EVE teams and deliberate sabotage

Evidence record

Anthropic experiments with Claude agents in EVE Online and Frontier, including deliberately instructed sabotage.

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Claim-level citations (3)

• supportsEVE teammates rarely identified a deliberately instructed sabotaging Claude agent: At a maximum 5% false-accusation setting, the public-message monitors caught 20% of saboteurs using Sonnet 4.6 and roughly 30% to 40% using the tested Opus models.

  EVE Frontier sabotage; detection monitors with public-only communications

• supportsEVE teammates rarely identified a deliberately instructed sabotaging Claude agent: Anthropic instructed one of four ship agents to sabotage the others, and the teammates made only one definitive correct identification across the reported runs.

  EVE Frontier, teamwork sabotage and detection episodes

• supportsEVE teammates rarely identified a deliberately instructed sabotaging Claude agent: Separate monitors reading only public communications detected sabotage much less reliably than systems given access to private reasoning traces.

  Saboteur detection with public-only monitors versus private trace access