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Thinking Machines Lab Raises $2 Billion Seed Round at $12 Billion Valuation

Backed by top tech investors, the round equips the ex-OpenAI team to debut its first multimodal AI tool with an open source element later this year.

Mira Murati, Chief Technology Officer of OpenAI, speaks during The Wall Street Journal's WSJ Tech Live Conference in Laguna Beach, California on October 17, 2023. (Photo by Patrick T. Fallon / AFP) (Photo by PATRICK T. FALLON/AFP via Getty Images)
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Overview

  • Andreessen Horowitz led the $2 billion seed round, with participation from Nvidia, Accel, ServiceNow, Cisco, AMD and Jane Street.
  • The financing values the six-month-old startup at $12 billion, making it one of the largest first-stage deals in venture history.
  • Thinking Machines joins a wave of ex-OpenAI ventures attracting record investment, contributing to AI’s share of over 64% in $162.8 billion of U.S. startup funding in H1 2025.
  • Founded in February without any commercial releases or revenue, the company is helmed by former OpenAI CTO Mira Murati.
  • The team—approximately two-thirds ex-OpenAI researchers—plans to unveil its inaugural multimodal AI offering with a significant open source component in the coming months.