Thinking Machines Lab

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This article is about the 2025 artificial intelligence company. For the 1983 supercomputer manufacturer, see Thinking Machines Corporation. For other uses, see Thinking machines (disambiguation).
Thinking Machines Lab Inc.
Company typePrivate
IndustryArtificial intelligence
FoundedFebruary 2025; 1 year ago (2025-02) in San Francisco, California
FounderMira Murati
Headquarters
San Francisco, California
,
United States
Key people
ProductsAI systems and platforms
Number of employees
50 (2025)[1]
Websitethinkingmachines.ai

Thinking Machines Lab Inc. is an American artificial intelligence (AI) startup founded by Mira Murati, the former chief technology officer of OpenAI.[2] The company was founded in February 2025, and by July had completed an early-stage funding round led by Andreessen Horowitz, raising $2 billion at a valuation of $12 billion overall from investors such as Nvidia, AMD, Cisco, and Jane Street.[3] The company is based in San Francisco and structured as a public benefit corporation.[4][5]

History

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By its launch in February 2025, Thinking Machines Lab was reported to have hired about 30 researchers and engineers from competitors including OpenAI, Meta AI, and Mistral AI.[6][7][8][9][10] Its founding team members include Barret Zoph, former OpenAI VP of Research (Post-Training), Lilian Weng, former OpenAI VP, and OpenAI cofounder John Schulman, who joined after a brief stint at the lab's competitor Anthropic.[11][12] Other former OpenAI employees who have been hired include Jonathan Lachman and Andrew Tulloch (although Tulloch departed after getting recruited for Meta Superintelligence Labs).[13][14] Thinking Machines Lab's advisers include Bob McGrew, previously OpenAI's chief research officer, and Alec Radford, who was a lead researcher for OpenAI.[15][16]

On October 1, 2025, it announced Tinker, an API for fine-tuning language models. Users would submit jobs through the API for fine-tuning one of the various open-weight models supported. The Lab would run the jobs on its internal clusters and training infrastructure.[17]

Business structure

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Thinking Machines Lab grants Mira Murati a deciding vote on board matters, weighted to provide her with a majority decision-making capability. Additionally, founding shareholders possess votes weighted 100 times greater than those of regular shareholders.[18]

In July 2025, Andreessen Horowitz was reported to have led the company's initial funding round, raising "about $2 billion at a valuation of $12 billion".[3][19] The government of Albania (Murati's country of origin) was also included in this round, making a $10 million investment which required an amendment to the country's 2025 budget.[20][21]

References

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