Mira Murati: The Woman Behind ChatGPT Is Now Building Her Own AI Company

M ira Murati is no longer just one of the most important figures behind modern artificial intelligence. She is now stepping out on her own—and building something the entire tech world is watching closely.

After years inside OpenAI, where she played a central role in the development of ChatGPT and other frontier AI systems, Murati left in 2025 to found Thinking Machines Lab, a new artificial intelligence company focused on the next phase of machine intelligence.

This is not a typical startup story. It is the story of someone who helped shape the current AI era now trying to redefine what comes after it.

Inside the Company That Changed AI

At OpenAI, Murati served as Chief Technology Officer during a period when artificial intelligence moved from research labs into everyday life.

Under her technical leadership, systems like ChatGPT, image generation tools, and multimodal AI models became global products used by millions of people. These tools changed how people write, code, learn, and communicate.

Her role placed her at the center of one of the fastest technological shifts in modern history.

Why She Left

Thinking Machines Lab was born out of a different question than the one driving most AI companies today.

Instead of asking how to make AI bigger or more powerful, the focus is on something more difficult:

How do humans stay in control of systems that are becoming increasingly intelligent?

The company is working on improving how AI systems behave, reason, and interact with people in real-world use cases.

It reflects a growing concern in the industry: intelligence alone is not enough—control and reliability matter just as much.

A Bigger Shift in the AI Industry

Murati’s move is part of a wider trend in artificial intelligence. Many of the engineers and leaders who built today’s most advanced AI systems are now leaving large companies to start their own.

This is creating a new wave of competition:

former OpenAI leaders building rival labs

ex-Big Tech engineers launching independent AI startups

research teams focusing on safety, control, and reasoning

The AI race is no longer dominated by one or two companies. It is fragmenting into multiple competing visions of the future.

Why Her New Company Matters

Even though Thinking Machines Lab is still early-stage, it carries unusual weight because of Murati’s background.

She is not entering the AI industry as an outsider trying to break in. She is someone who helped build its foundation.

That makes her new company less of a gamble and more of a continuation of ongoing work inside the most advanced AI systems in the world.

Conclusion

Mira Murati’s transition from OpenAI executive to startup founder marks a shift in the AI landscape itself.

The first phase of artificial intelligence was about building powerful systems. The next phase may be about making those systems understandable, controllable, and safe enough to rely on at scale.

And one of the people now leading that second phase is someone who helped build the first.