SaaStr at $350B Anthropic Valuation: a16z's $15B Fund Is Mathematically Rational — AI Labs Justify New Venture Scale

SaaStr·low signal

SaaStr's latest analysis examines how Anthropic's implied $350B valuation and OpenAI's trajectory make a16z's $15B fund raise (largest in venture history) mathematically defensible, not reckless — if the AI labs are worth $350B-$1T+, then $15B represents proportional exposure to the infrastructure layer. The framing signals a structural change in venture math: software infrastructure is now the platform play, not applications, reversing a decade of 'infrastructure is commoditizing' conventional wisdom.