Mira Murati, the former chief technology officer of OpenAI, has emerged as one of the most watched founders of 2025, launching a breakthrough artificial intelligence startup and securing one of the largest early-stage funding rounds in tech history.
In February 2025, Murati announced the launch of Thinking Machines Lab, an AI research and product company aimed at building next-generation AI systems that are powerful, customizable, and accessible. The startup brought together top talent from leading AI labs, including researchers from OpenAI, Meta, and other pioneers in machine intelligence.
Just months after its public debut, Thinking Machines Lab closed a massive seed funding round of roughly $2 billion, led by venture capital firm Andreessen Horowitz with participation from major tech investors including Nvidia, AMD, and Cisco. That round alone valued the company at about $12 billion, one of the most significant seed rounds ever seen in the AI industry.
Murati’s leadership and vision have set the tone for the startup’s ambitious mission — to make advanced AI tools easier for developers and researchers to customize without requiring extensive infrastructure. In October 2025, Thinking Machines Lab unveiled its first product, Tinker, an API designed to help developers fine-tune large language models more efficiently and flexibly.
Despite its rapid rise, the company has faced industry challenges, including competition for top talent. Several high-profile employees have returned to OpenAI or moved to rival organizations amid a broader “talent war” in AI research.
Still, Murati’s success in building a team, securing record-setting funding, and shipping products within its first year highlights her impact on the global AI landscape. Her journey from CTO of a leading AI lab to founder and CEO of a major new player underscores a broader shift in the industry as innovators experiment with new approaches to building and scaling advanced intelligence.
As Thinking Machines Lab continues to grow and expand its offerings, Murati’s vision stands as a major focal point in the race to define the future of AI — balancing capability with accessibility and ethical development.
