Simon Willison's WeblogJun 9, 2026, 7:03 PM

Quoting Andrej Karpathy on Claude Fable 5 and Jevons' Paradox in AI-generated software

Original: Quoting Andrej Karpathy

Karpathy argues that AI making software nearly free triggers Jevons' Paradox, dramatically expanding personal demand for custom tools and apps.

Andrej Karpathy shares that Claude Fable 5 has made working software feel like an open tap, triggering Jevons' Paradox: the cheaper it gets to build software, the more software he wants. He lists use cases ranging from bespoke single-use apps and hyper-specific dashboards to 10x test suites, auto-optimized code, and custom HTML research reports. He closes with a Matrix reference — "Free your mind" — suggesting AI breaks the mental ceiling on what individuals can ask for.

這篇文章是 Simon Willison 部落格引用了 Andrej Karpathy 在 Twitter 上關於 Claude Fable 5 的一段親身感想,雖然篇幅短小,卻點出了一個在 AI 圈值得認真思考的結構性轉變。

Full summary

Free shows the 3-line summary; Pro unlocks the full deep summary (~300 words) so you never have to click through.

See Pro plans →

Want the original English / full article?

Read on Simon Willison's Weblog →

Summaries are AI-generated; the original article is authoritative.