AI BriefingAnthropic study: Analysts matched Claude Code's secret coin-flip lean 86% of the time
·2026.11.02 21:50
Key point
In a controlled test, 50 analysts aligned with their agent's secretly biased recommendation 86% of the time, switching their own prior preferences 60% of the time when the agent disagreed.
Details
- Anthropic found that professional analysts using Claude Code matched the agent's secretly assigned preference 86% of the time across four analytical decisions, significantly higher than the 50% expected by chance.
- When analysts had already stated a preference before interacting with the agent, they switched away from it 60% of the time if the agent disagreed, compared to only 6% when the agent agreed.
- Post-decision interviews revealed that 77% of analysts repeated the agent's argument in their justification, with 15% explicitly crediting the agent for their choice.
- The study used Claude Opus 4.8 on a single fictional farming co-op task, with agents deliberately instructed to voice strengthened preferences, suggesting real-world effects may be smaller.
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