Lenny's Newsletter · 8 September 2026

How we built Grok Bot in a month | Roman Ugarte (SpaceXAI)

Lenny Rachitsky

Roman Ugarte shares how SpaceXAI built Grok Bot from scratch in four weeks and launched publicly three weeks later, detailing early product decisions, team philosophy, and lessons on building defensible products in competitive markets.

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Topics: AI (Horizontal)

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