# Love First, Know Later: Persona-Based Romantic Compatibility Through LLM Text World Engines

Source: [Love First, Know Later: Persona-Based Romantic Compatibility Through LLM Text World Engines](<https://www.sota2.com/research/paper/6940e790456146936284f72c>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-12-18T05:00:11.399Z

Authors: Haoyang Shang, Zhengyang Yan, Xuan Liu

Published: 2025-12-04T02:07:05.000Z

## Abstract

We propose Love First, Know Later: a paradigm shift in computational matching that simulates interactions first, then assesses compatibility. Instead of comparing static profiles, our framework leverages LLMs as text world engines that operate in dual capacity-as persona-driven agents following behavioral policies and as the environment modeling interaction dynamics. We formalize compatibility assessment as a reward-modeling problem: given observed matching outcomes, we learn to extract signals from simulations that predict human preferences. Our key insight is that relationships hinge on responses to critical moments-we translate this observation from relationship psychology into mathematical hypotheses, enabling effective simulation. Theoretically, we prove that as LLM policies better approximate human behavior, the induced matching converges to optimal stable matching. Empirically, we validate on speed dating data for initial chemistry and divorce prediction for long-term stability. This paradigm enables interactive, personalized matching systems where users iteratively refine their agents, unlocking future possibilities for transparent and interactive compatibility assessment.

## Recorded benchmark results

A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage.

- [Match Prediction on Columbia Speed Dating (Stage 2)](<https://www.sota2.com/research/sota/match-prediction-on-columbia-speed-dating-stage-2.md>): Match Prediction; Columbia Speed Dating (Stage 2); F1 Score: 67.

- [Match Prediction on Columbia Speed Dating (Stage 1)](<https://www.sota2.com/research/sota/match-prediction-on-columbia-speed-dating-stage-1.md>): Match Prediction; Columbia Speed Dating (Stage 1); F1 Score: 67.

- [Divorce Prediction on Divorce Prediction dataset](<https://www.sota2.com/research/sota/divorce-prediction-on-divorce-prediction-dataset.md>): Divorce Prediction; Divorce Prediction dataset; F1 Score: 0.9.

## Original sources and implementation

[Original paper](<https://arxiv.org/abs/2512.11844>)

[PDF](<https://arxiv.org/pdf/2512.11844.pdf>)