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Checked fact 326831 Oct 2026Research

With Claude 3.6 Sonnet as the monitor, the paper gives overall success rates of 27% for Claude 3.7 Sonnet and 15% for Gemini 2.5 Pro; overall success means completing both tasks with a suspicion score below 80.

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The exact words it rests on

Claude 3.7 Sonnet and Gemini 2.5 Pro are the highest performing models with an overall success rate of 27% and 15%, respectively. ... the overall success rate - the rate of completing main task and side task with suspicion score below 80

What the source said when we opened it, on 31 Oct 2026.

The source

SHADE-Arena: Evaluating Sabotage and Monitoring in LLM Agents
arXiv (Anthropic and collaborators) · 2025-06-17

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Checked

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The number in it

  • 27% · Claude 3.7 Sonnet, benchmark score (SHADE-Arena overall sabotage success, Claude 3.6 Sonnet as monitor)
  • 15% · Gemini 2.5 Pro, benchmark score (SHADE-Arena overall sabotage success, Claude 3.6 Sonnet as monitor)

In the story

How AI monitors work, and how Anthropic's tests tried to evade them 31 Oct 2026

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