Persona Atlas: Mapping How Famous Minds Think

TL;DR. Persona Atlas turns a public figure into a behavioral portrait you can actually measure. You type a name, a small-model agent researches that person on the open web, writes up a grounded dossier, and then answers a fixed set of open-ended "thinking" questions in their voice. Every answer gets embedded, so a persona stops being a wall of prose and becomes a point in space. Line several thinkers up next to each other and you can see who reaches for skepticism, who for humor, who for cold abstraction. The bet underneath it: personality is mostly style, not horsepower, so it survives even when the models doing the talking are small. Which, this being the build-small hackathon, is sort of the whole point.

Watch the short tour: research a persona, compare a few, read the trait heatmap.

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The question that started it

What if you could put Socrates, Churchill, and a Silicon Valley founder in the same room, hand them the same unanswerable question, and watch how differently each one reaches for an answer? Most benchmarks measure what a model knows. Persona Atlas is after something harder to pin down, which is how a given mind moves, and it tries to make that visible instead of just claiming it.

How it works

A run has three steps.

First, research. A tool-calling agent runs real web searches, pulls a portrait, and puts together a public profile, a list of grounded facts (each one linked back to a source it actually visited), and a "style hypothesis" that's its best guess at how this person attacks a problem they've never seen before.

Second, the persona answers the benchmark: ten deliberately open-ended prompts about identity, ethics, truth, free will, meaning, and machine consciousness. There are no right answers, on purpose. These are the questions where a personality leaks through instead of the model's raw capability.

Third, every answer becomes an embedding. That turns each persona into points you can compare: put two side by side and measure the distance between their answers.

Comparing minds

Pick any of the saved personas and the comparison view does two things. It measures how far apart their answers sit in embedding space, giving you one number for how much the whole group diverges, and it scores each persona against ten trait anchors (meticulousness, clarity, creativity, skepticism, confidence, kindness, humor, curiosity, pragmatism, abstraction), drawn as a trait-leaning heatmap.

The grid is double-centered, which matters more than it sounds. A warm cell never means "high on this trait" in some absolute sense. It means this persona leans toward that trait more than the others you happened to put on the table. Drop a handful of very different people side by side and the rows pull apart. One runs warm on humor and confidence, another on abstraction and skepticism.

Under the hood

Everything runs on small, hosted models through Hugging Face Inference Providers: a compact generator driving the agent, a lightweight embedding model doing the geometry, plus live web and image search for grounding. The front end is Gradio, with three tabs: research a run, compare saved personas, and inspect the full agent trace, so you can check for yourself that it leans on real sources rather than quietly making things up. A set of personas ships prebuilt, so the comparison works the moment the page loads, no token required.

Try it

Open the Compare saved personas tab to start, or research someone new and add them to the atlas: huggingface.co/spaces/build-small-hackathon/persona-atlas