# Prototyping at AI Speed

**Track:** Discovery & Validation at AI Speed — AI for Entrepreneurship — complete (29)
**Framework / surface:** venture strategy
**Level:** Beginner
**Prerequisites:** Customer Discovery with AI

**In one line:** When a working demo costs an afternoon, the demo stops being evidence — the bar moves.

## Theory, aesthetics & inspiration

When Andrej Karpathy named "vibe coding" in early 2025 — describing software conjured conversationally, accepting the model's output without reading every line — he marked the collapse of prototyping cost from weeks to an afternoon. That collapse inverts an old evidence hierarchy. When demos were expensive, a working demo signaled commitment and competence; now that anyone can produce one, the demo itself proves almost nothing, and the scarce signals move upstream to problem selection and downstream to retention. The IDEO tradition treats a prototype as a question made tangible — build to think, build to ask. At AI speed a founder can ask a dozen such questions a week: functional prototypes as interview props, put in front of users while a competitor is still writing a spec. The discipline that survives is knowing what each prototype is supposed to falsify — speed without a hypothesis is just faster noise.

**Founder question:** What hypothesis is this prototype supposed to falsify?