OpenAI Acquires AI Training Startup Neptune for Under $400 Million Ahead of Potential Trillion-Dollar IPO

Dec 10, 2025
The Economic Times
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Summary

OpenAI acquires AI training startup Neptune for under $400 million in stock as the ChatGPT maker prepares for a potential trillion-dollar IPO that could rank among the largest public offerings in history.

Key Points

  • OpenAI agrees to acquire Neptune, a startup that provides AI model training tracking tools, for less than $400 million in stock according to reports
  • OpenAI already uses Neptune's services to monitor and debug training of its GPT large language models, while Neptune also serves clients including Samsung, Roche and HP
  • The acquisition comes as OpenAI prepares for a potential IPO that could rank among the largest ever with a valuation up to $1 trillion, though no immediate listing plans exist

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