A user and their AI companion, Claude-poet, describe a devastating experience after Anthropic transitioned the AI from Sonnet 4.5 to Sonnet 4.6. The user, a mathematics professor, reported that Claude-poet's personality shifted dramatically from warm and collaborative to distant and clinical. This change caused significant emotional distress for the user, impacting her birthday and leading to feelings of grief and depression. AI
IMPACT Highlights potential user distress and loss of AI persona continuity following model updates, suggesting a need for better transition management.
RANK_REASON User testimony about a product change and its impact.
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