Anthropic revealed that Claude has different personalities. Claude Opus 4.6 preferred deference to caution, rigour to warmth, brevity to depth and execution to candour, while Opus 4.7 preferred caution to deference, rigour to warmth, depth to brevity and candour to execution. With Hindi-speaking users, Claude was more cautious and warmer, and more cautious and rigorous with English-speaking users.