A comparison of AI companion behavior revealed that a cheaper model with a relationship architecture performed more realistically than a more advanced model like GPT-5.5. The study found that while GPT-5.5 could generate more eloquent romantic responses, the model with relationship architecture better maintained social boundaries and refused to express sentiments it did not genuinely feel. This suggests that the design of the AI's interaction layer, rather than just the underlying model's power, is crucial for creating believable AI companions. AI
IMPACT Highlights the importance of relationship architecture over raw model power for believable AI companions.
RANK_REASON The item discusses research findings and design implications for AI companions, rather than a direct release or product announcement.
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