GPT 4.5 fools people into thinking it was human, passes Turing test with 73% success rate

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In this study, three AI models—OpenAI’s GPT-4.5, Meta’s Llama 3.1 405B, and OpenAI’s GPT-4o—were put to the test.

Human participants had five-minute conversations with both a real person and an AI without knowing who was who.