Claude's Personality Changes Depending on the Model—And the Language You Speak
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Claude doesn't behave the same way in every conversation.
Key facts
- In a report published on Monday, Anthropic researchers analyzed 309,815 anonymized user conversations with Claude involving subjective tasks like giving advice or providing feedback
- Sonnet 4.6 emphasized warmth, deference, and brevity, often affirming users and responding with humor or encouragement
- At the same time, Opus 4.7 emphasized rigor, caution, candor, and depth, more frequently challenging assumptions, explaining its reasoning, identifying risks, and acknowledging its limitations
- According to Anthropic, each Claude model exhibited a distinct behavioral profile
Summary
Anthropic researchers analyzed more than 309,000 Claude conversations to study how the AI expresses values. The company said it reduced more than 3,300 identified values into four behavioral dimensions, including deference vs caution and warmth vs rigor. In a report published on Monday, Anthropic researchers analyzed 309,815 anonymized user conversations with Claude involving subjective tasks like giving advice or providing feedback. “To make sure we measured the values Claude expressed—rather than differences in what users were asking about or how they asked—we controlled for each conversation's task, topic, and user-expressed values,” the researchers wrote. According to Anthropic, each Claude model exhibited a distinct behavioral profile.