10 Dec 2025

Andersen Advises Neptune.ai on Sale to OpenAI

"Andersen, together with Gunderson Dettmer, advised Neptune.ai on its sale to OpenAI, while Wachtell Lipton Rosen & Katz advised OpenAI. OpenAI, developer of the GPT family, acquired Neptune.ai, a provider of tools to monitor, analyse and compare machine-learning training experiments that has collaborated with OpenAI on a metrics dashboard used in foundation-model research."

Andersen, together with Gunderson Dettmer, advised Neptune.ai on its sale to OpenAI, while Wachtell Lipton Rosen & Katz advised OpenAI. The transaction involved the acquisition of Neptune.ai by OpenAI. OpenAI is the global artificial intelligence developer behind the GPT family of models. Neptune.ai develops tools for monitoring, analysing and comparing machine-learning training experiments and has collaborated with OpenAI for several years, including on the creation of a metrics dashboard used in research involving foundation models. Andersen represented Neptune.ai with a team composed by: Partners Rafal Ciolek and Konrad Kleszczewski. Gunderson Dettmer represented Neptune.ai. Wachtell Lipton Rosen & Katz represented OpenAI.
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