Unconventional AI, a two-month-old startup founded by former Databricks AI chief Naveen Rao, has secured $475 million in seed funding at a $4.5 billion valuation to develop novel, energy-efficient computers designed specifically for AI workloads.

The round was co-led by Andreessen Horowitz and Lightspeed Venture Partners, with participation from Lux Capital, DCVC, Databricks, and Amazon founder Jeff Bezos. Rao himself invested $10 million at the same terms. The funding represents the first portion of a potential $1 billion raise.

Unconventional AI aims to address AI's growing energy constraints by rethinking computer architecture, drawing inspiration from biological systems. The human brain, Rao notes, operates on just 20 watts while performing tremendous computational work. The startup is exploring analog computing approaches and leveraging semiconductor physics to run AI models more efficiently.

Rao joins a growing list of prominent tech executives launching multibillion-dollar AI startups, including former OpenAI CTO Mira Murati and co-founder Ilya Sutskever.