GPT-6 spent 5 days building this city, per Matthew Berman's demo video
Matthew Berman · youtube · 2026-09-16
YouTuber Matthew Berman published a video claiming GPT-6 spent 5 days autonomously building an entire city as a demo of long-horizon agentic capability. The video doubles as promotion for his newsletter, Discord, and social channels, so the demo claim should be taken with some caution.
Related event: GPT-6 Astra Autonomously Builds a Minecraft City Over 5 Days(4 posts)→
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