65K synthetic personas project 136 English council elections
65k synthetic personas replace human polling for UK election forecasts.

DYNAMICS-8 personality model beats generic demographic weighting for synthetic voters.
Political analysts, data scientists, polling organizations
FiveThirtyEight · Polymarket · YouGov MRP
65k synthetic personas replace human polling for UK election forecasts.
The core clever bit is the compact voter engine — seven ideological axes, voter 'clumps', salience and loyalty heuristics — all running client-side so you can tinker instantly in your browser. The migration from a Python CLI to Next.js and finally a Vite+React static build is a pragmatic engineering arc, but this is explicitly a toy-grade sandbox rather than a calibrated polling tool; add scenario export or real-data seeding and it jumps several tiers.
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Claude Opus spent $59.55 versus MiMo-Flash at $0.39 for identical bracket predictions.