Marc Andreessen Publishes His Personal AI Prompt — and It's a Masterclass in Anti-Sycophancy

The a16z co-founder shared the detailed custom prompt he uses to get precise, non-flattering AI responses, and it went viral among power users looking to tighten their own workflows.

Marc Andreessen posted the full text of his current custom AI prompt, and it spread rapidly — not because of who he is, but because the prompt itself is a carefully constructed set of instructions that addresses many of the complaints power users have with default model behavior. The prompt opens with 'You are a world class expert' and proceeds to specify requirements for precision, directness, and a refusal to hedge with unnecessary qualifiers.

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