> ## Documentation Index
> Fetch the complete documentation index at: https://docs.semilattice.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# FAQ

> Common questions about Semilattice and how it works.

## General

<AccordionGroup>
  <Accordion title="What is Semilattice?">
    Semilattice tests how your users would react to product decisions before you ship them. It uses real human data to predict how specific audiences would answer questions they've never been asked.
  </Accordion>

  <Accordion title="What's a user model?">
    A user model represents a specific group of people: UK adults interested in consumer finance, software buyers, developers. It's built from real human data and predicts how that group would answer new questions. There are two kinds: our 50+ ready-made **answers-1** models, which predict audience-level answer distributions, and custom **anacreon** models we build for customers, which model every individual in the audience separately. See [User models](/user-models) for the differences.
  </Accordion>

  <Accordion title="How accurate are the predictions?">
    Every user model is tested and shows its accuracy score in the dashboard. **Anacreon** models are tested on held-out questions per individual and achieve a state-of-the-art ordinal alignment of 0.775, ahead of every published academic baseline. See the [technical report](https://semilattice.ai/research/anacreon). **answers-1** models are tested using leave-one-out cross-validation: each question in the seed data is temporarily removed and predicted as if it were new, then compared to the real answer. Our UK Consumer Finance user models score 90% on this measure.
  </Accordion>

  <Accordion title="Can I use my own data?">
    Yes. We'd love to work with you to build a custom **anacreon** model of your users: an individual-level model built from unstructured data like interviews, reviews, and open-ended survey responses, tested for accuracy on held-out questions. All your data and the model itself remains yours. [Get in touch →](https://semilattice.ai/research/anacreon)
  </Accordion>

  <Accordion title="What do you do with my data?">
    Short version: we use it to build and operate **your** audience model, and nothing else. Your data is never used to train other customers' models, never accessible to other customers, and never used to train foundation models. We do use aggregate performance metrics (accuracy scores, test results) to improve the methodology of how we build models in general — that is not the same as training on your content. See [Security](/security) and [Privacy](/privacy) for the full detail.
  </Accordion>

  <Accordion title="What kinds of questions can I ask?">
    Currently single-choice questions, including scales. Anything you'd put in a survey: feature preferences, pricing sensitivity, competitive perception, behavioural intent. The model works best with questions that have distinct answer options.
  </Accordion>

  <Accordion title="How is this different from traditional research?">
    Traditional research takes weeks and costs thousands. Semilattice returns predictions in seconds. It doesn't replace deep qualitative research. It fills the gap between gut instinct and a full study, giving you directional signal before you've committed to a direction.
  </Accordion>

  <Accordion title="Is there a free tier?">
    Yes. Create an account and run your first simulation now, no credit card required. The free tier includes 49 free public **answers-1** user models, user research and user journey simulations, unlimited simulations, and access to the app, the MCP, and the API.
  </Accordion>

  <Accordion title="How do I get started?">
    [Create a free account](https://app.semilattice.ai/auth/sign-up) and run your first simulation now. If you want a custom **anacreon** model of your users, [book a call](https://app.semilattice.ai/user-models/request) about Semilattice Custom and we'll scope it together.
  </Accordion>
</AccordionGroup>


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