Former OpenAI CTO’s AI Venture Thinking Machines Secures $2 Billion at $10 Billion Valuation

Artificial intelligence startup Thinking Machines Lab has raised $2 billion in seed funding, achieving a valuation of $10 billion within just six months of its launch. The funding round was led by Andreessen Horowitz, alongside Conviction Partners. This investment is among the largest seed rounds in Silicon Valley, reflecting strong investor interest in AI ventures founded by former OpenAI executives. Founded in February 2025 by former OpenAI CTO Mira Murati, who serves as CEO, the company has rapidly grown to a team of about 30 engineers and researchers, many of whom are ex-OpenAI employees. Notable hires include John Schulman, a cofounder and former head of alignment at OpenAI, and Barret Zoph, who left OpenAI simultaneously with Murati. Thinking Machines Lab is part of a wave of AI startups led by ex-OpenAI leaders, including Anthropic and Safe Superintelligence Inc.

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