Thinking Machines Lab in talks for funding at $50 billion valuation, Bloomberg reports

Investing.com -- AI startup Thinking Machines Lab is in early discussions to raise a new funding round that would value the company at approximately $50 billion, according to Bloomberg, citing people familiar with the matter.

The potential valuation would represent more than a fourfold increase from the company’s July valuation, elevating the startup to the ranks of the most valuable private companies less than a year after its launch.

The deal terms remain under negotiation and could change, said the sources, who requested anonymity to discuss private matters. While multiple sources indicated the target valuation is around $50 billion, others suggested it could reach $55 billion or $60 billion.

Thinking Machines Lab was founded by Mira Murati, former chief technology officer at OpenAI, and launched in February 2025. The company focuses on building AI models and products designed to enhance "human-AI collaboration" across various work domains. Murati recruited dozens of employees from OpenAI, the creator of ChatGPT, to join her venture.

The startup has already released its first product, Tinker, which allows users to more easily customize or "fine-tune" large language models. Research groups at Princeton and Stanford universities have been using Tinker, which has received positive feedback from early testers in the AI research community. The company also has secured paying business customers for the product, people familiar with the situation told Bloomberg.

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