The $2B Seed Round for Thinking Machines Lab

By Carl Ford July 28, 2025

(Note: This article was motivated by Tech Crunch’s piece written by Rebecca Bellan.)

Mira Murati, has named her new company “Thinking Machines Lab” with a valuation of $10B dollars and on a seed round of $2B. Led by Andreessen Horowitz, with participation from Sarah Guo’s Conviction Partners, the raise doubled the company’s original $1 billion goal. According to Business Insider, investors had to commit at least $50 million to participate.

Mira Murati’s track record and talent pool she can choose from makes Thinking Machines and expected success. Another reason for the expected success is the focus on the fields of science and engineering, but in building these solutions they are looking to make the AI system “widely understood, customizable, and generally capable,” and close major gaps in in today’s models and prioritization.

Mira Murati’s credibility is beyond reproach having led the development of at OpenAI on ChatGPT, DALL E and GitHubs’s Codex (called Copilot). Besides herself the founding team consists of rock stars in their own right. John Schulman, an OpenAI co-founder and co-creator of ChatGPT, is chief scientist. Barret Zoph, former VP of research at OpenAI, is CTO. Other key hires include Jonathan Lachman, Lilian Weng, Luke Metz, Sam Shleifer, and Stephen Roller—many of them with OpenAI ties. Researchers from DeepMind, Meta, CharacterAI, and Mistral AI have also joined. Bob McGrew and Alec Radford, both key figures in OpenAI’s early breakthroughs, are advisors.

A key question in an evaluation this high is, what makes Thinking Machines unique? I mean, we have enough people improving search with AI, but being me too doesn’t mean much, and given Murati’s previous interviews, you would expect a great deal of strategy. On ThinkingMachines.ai we have something that looks like a manifesto typed on an old Smith-Corona typewriter.

The stated purpose is “building a future where everyone has access to the knowledge and tools to make AI work for their unique needs and goals.”

After supporting paragraphs come a series of goals or best practices

“We believe that methods developed for present day systems such as effective red-teaming and post-deployment monitoring, provide valuable insights that will extend to future, more capable systems.”

Reading the manifesto in full I am not sure if I am going to a revival meeting or an episode of HBO’s Silicon Valley.

However, “Building next-gen models isn’t cheap. Training large systems and hiring top talent requires serious capital. In that sense, the $2 billion isn’t about runway—it’s table stakes.”




Edited by Erik Linask


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