Pax Historia bets LLMs can power grand strategy; 35K DAU, 100B tokens a week in alpha

Pax Historia is a free-to-play, browser-based alternate-history sandbox where players choose a country and a moment in history — 'What if Rome never fell?' — and then act through natural language. An LLM plays every other nation, responding to alliances, threats and declarations of war like a real chancellery, and updates the map, relationships and future events as the world evolves.

The game was born at a hackathon, built by Virginia Tech freshman roommates Eli Bullock-Papa and Ryan Zhang. It entered Y Combinator's Winter 2026 cohort, and by Demo Day in March 2026 the founders claimed 35,000 daily users and nearly 20 million rounds played — enough for TechCrunch to list it among the batch's investor favorites.

The technical bet is that a language model can replace the scripted event trees of traditional grand strategy. Pax Historia routes gameplay across roughly thirty models via OpenRouter, using cheaper models for routine reactions and stronger ones for complex diplomacy. Community creators publish preset worlds — real history, alt-history, fantasy and sci-fi — and the founders report more than 4,000 presets with 50+ plays each and over 100 billion tokens processed per week.

As of September 2026 the game remains in alpha and the company is hiring engineers, with the founders emphasizing the network effect of user-generated worlds and the cost challenge of running AI for every nation in every game. Funding amount and revenue are not public.