Karpathy's New AI Vibe Test: 1 Paragraph of LOTR Yields 5,500 Lines of 3D Code

The Decoder · rss · 2026-08-03

OpenAI co-founder Andrej Karpathy is exploring a new AI capability benchmark known as the "Vibe Test." Using Anthropic's Claude Opus, he prompted the model with just the opening paragraph of The Lord of the Rings, successfully generating a 3D browser scene comprising 5,500 lines of code.

This type of test—generating complex, interactive 3D code directly from natural language descriptions—is becoming a new trend for evaluating the practical coding and comprehension capabilities of frontier large language models.

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