humans& debuts Persimmon, a model built to simulate human conversation

For AI to work with us, it needs to understand us Today, we're introducing Persimmon, the first large-scale model designed to realistically simulate how people talk and interact

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Why this model category? User models let us roll out a hypothetical situation or explore the consequences of an event or decision Good user models are a key step towards AI that understands the differences between people and how they change

As you have likely seen, AI text often has tells that make it bad at capturing the real distribution of human conversations. Assistant-simulated conversations are less diverse than human conversations and evolve more predictably

In our tests, an AI judge could almost always spot conversations generated by frontier assistant models prompted to simulate people Compared to these models, Persimmon's conversations were much harder to distinguish from human ones