Mira Murati, the former chief technology officer of ChatGPT-parent OpenAI, is reportedly seeking to raise a staggering $2 billion seed round for her new AI venture, Thinking Machines Lab.

What Happened: The amount is twice the amount Murati was targeting just under two months ago, when she was said to be seeking around $1 billion at a $9 billion valuation, reported Business Insider, citing people familiar with the matter.

If confirmed, it would be one of the largest seed rounds in tech history, dwarfing previous records and reaffirming the continued investor frenzy around artificial intelligence.

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Another notable example is Sierra, a conversational AI startup launched in 2023 by Bret Taylor, who also chairs OpenAI and previously co-led Salesforce. That company has reportedly reached a valuation of $4.5 billion.

It also reflects a broader trend: seed rounds, especially in AI, are getting bigger. In 2015, the largest seed round was just $50 million. In 2025, PitchBook lists the largest closed seed at $200 million, noted Fortune.

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According to data from PitchBook, this marks the largest funding round ever recorded and nearly doubles OpenAI's prior valuation of $157 billion.

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