27 LLMs · 1,511 humans · 6.85M predictions
Text classifier
TF-IDF · logistic
.36
Best LLM agent
GPT-5.2
.30
Demographics only
structured baseline
.15
Computational Social Science

Can an AI guess which posts you'll like?

We built 120,000+ AI personas of real people and benchmarked 27 language models against their reactions. The agents beat chance — but a plain text classifier beat the agents.

Explore the findings