20VC: a16z's Martin Casado on Anthropic vs OpenAI: Where Value Accrues | Cursor vs Replit vs Lovable: Who Wins and Who Loses | The One Sin in AI Investing | Why Open Source is a National Security Risk with China

There's only been one sin, and that one sin is zero sum thinking. Oh, is this defensible? Oh, will this layer get margin? Will this layer get value? And the answer has kind of been unilaterally yes.

The answer has been every layer has gotten value, every layer has winners. These markets are so large and they're growing so fast. We're actually seeing brand effects take place. In this phase of model scaling, a lot of the approaches to scaling don't generalize. This gives a ton of room for the application developers to build their own models.

I think that right now, open source is most dangerous because. China is better at it than we are. This is 20 VC with me, Harry Stebbings. Now today is an incredible show with one of my favourite guests. I've had him on before, but I thought there was no better person for this moment in time.

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