11 AI Models Run Transport Firms for 10 Years in OpenTTD: Opus Wins With £45.8M Airline
rachittshah · x · 2026-10-16
Developer rachittshah open-sourced Railhead, an RL environment where 11 AI models each run an OpenTTD transport company with up to £500K in loans over ten in-game years, with all games replay-verified tick-for-tick before scoring.
- Claude Opus built an airline and won with a £45.8M valuation
- Haiku built the biggest fleet but placed 8th
- Fable ran out of quota after 3 years — its abandoned company still beat 5 models that played all 10
- One model ended poorer than if it had never played
The environment includes replay-verified rewards, run-off valuation, priced forks, and promise-keeping contracts; code is on GitHub.
Related event: Claude Opus beats 10 rival AI models in OpenTTD, netting £45.8M(3 posts)→
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