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Mira Murati doubled the fundraising target for her new AI startup to $2 billion. It could be the largest seed round in history.

Former OpenAI CTO Mira Murati speaking in December 2024 in San Francisco.
Mira Murati, OpenAI's former chief technology officer, in December in San Francisco. Kimberly White/Getty Images for WIRED
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Mira Murati, OpenAI's former chief technology officer, is expanding her fundraising ambitions for Thinking Machines Lab, her hotly anticipated generative-AI company, which has been the subject of feverish interest and speculation from investors in Silicon Valley.

The company is raising upward of $2 billion in venture funding, people familiar with the matter told Business Insider. That's double what Murati was seeking less than two months ago when BI reported she was raising about $1 billion at a $9 billion valuation.

The new valuation Murati is seeking is not clear, though two people said it's at least $10 billion.

The round is in progress, and details could change. A spokesperson for Murati declined to comment.

The increased amount reflects intense investor enthusiasm for generative AI and the fact there are a very limited number of people with the expertise of Murati and the team she has assembled. It's also extremely expensive to train AI models and recruit and retain top talent.

Bob McGrew, OpenAI's former chief research officer, and the researcher Alec Radford recently joined Thinking Machines.

Several of Murati's other former coworkers are working for Thinking Machines, including John Schulman, who co-led the creation of ChatGPT; Jonathan Lachman, formerly the head of special projects at OpenAI; Barret Zoph, a cocreator of ChatGPT; and Alexander Kirillov, who worked closely with Murati on ChatGPT's voice mode.

Murati spent 6 ½ years at OpenAI, where she worked on the development of ChatGPT and other AI research initiatives. She was briefly appointed interim CEO in November 2023 after OpenAI's board abruptly fired Sam Altman, a move that sparked turmoil within the company. After Altman's reinstatement as CEO, Murati resumed her role as CTO.

It has been a mystery what exactly Thinking Machines will do to distinguish itself in a crowded and well-funded field that includes not only OpenAI but also Anthropic, Elon Musk's xAI, and Google's Gemini.

In a blog post earlier this year, Murati positioned the startup as an artificial intelligence research and product lab focused on making AI more accessible.

"To bridge the gaps, we're building Thinking Machines Lab to make AI systems more widely understood, customizable and generally capable," the post said.

Even by the standards of today's frothy AI market, $2 billion of funding for a startup less than a year old with no product is a gargantuan sum and would almost certainly rank as one of the largest, if not the largest, seed rounds in history.

Last year, OpenAI's cofounder Ilya Sutskever raised a $1 billion seed round for yet another AI startup, Safe Superintelligence.

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Ben Bergman
I'm a senior correspondent at Business Insider, where I cover the tech industry with a focus on venture capital and startups.I can frequently be seen on CNN and other channels providing analysis on a range of business and economic topics. I also appear often at dozens of the biggest events around the world, including the World Economic Forum, HumanX, and Web Summit.Please get in touch if you have a story to tell. For tips (not pitches), you can message me securely on Signal @BenBergman.11Previously, I was a senior reporter at LAist/Southern California Public Radio, where I covered business and economics. I have also written for The New York Times and Columbia Journalism Review and was a reporting intern at The Times. I started my career as a producer for NPR's Morning Edition and also produced award-winning documentaries for public television.I spent the 2017-2018 academic year at Columbia Business School as a Knight-Bagehot fellow. After that, I oversaw the development of The Journal, a daily podcast produced by The Wall Street Journal and Gimlet Media.Originally from Seattle, I graduated cum laude from Occidental College in Los Angeles with a degree in politics.In my free time, I love skiing, tennis,  poker, and cheering on the Seattle Seahawks. I competed in the 2024 World Series of Poker Main Event but sadly did not win.