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(Bloomberg) -- SoftBank Group Corp. is in discussions to invest as much as $25 billion in OpenAI, a move that would potentially make it the AI startup’s biggest backer.
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The Japanese investment company is in talks to put in between $15 billion and $25 billion, according to a person familiar with the matter. That would be in addition to the $15 billion that Masayoshi Son’s SoftBank has committed to Project Stargate, the Texas-based joint venture with OpenAI to build data centers and other AI infrastructure to support the ChatGPT maker, the person said, asking not to be named discussing private talks.
The plans are at an early stage and may not result in an investment, the person said. Representatives of SoftBank an OpenAI declined to comment.
Son stood alongside OpenAI Chief Executive Officer Sam Altman when US President Donald Trump announced the Stargate venture this month, and the two CEOs have been in contact for many years over their shared interest in advancing artificial intelligence development. Along with joint venture partners Oracle Corp. and Abu Dhabi-backed MGX, Stargate plans to deploy $100 billion initially and invest as much as $500 billion over four years.
OpenAI’s biggest investor Microsoft Corp. declined to comment. The Financial Times first reported the talks were in progress.
OpenAI hungers for more data center capacity to make its AI more powerful. It’s now facing a market crowded with rivals, emboldened by Chinese startup DeepSeek’s apparent success at matching OpenAI’s capabilities at a fraction of the cost. The US firm has so far relied on Microsoft for much of its cloud and computing needs.
SoftBank has been in search of an opportune moment to enter the lucrative AI hardware market after years of uneven bets on AI startups via the Vision Fund. Son and OpenAI’s Altman first met in 2019, when Son offered OpenAI $1 billion in investment, which never materialized. The two have since bonded over their shared concerns around the shortage of semiconductors needed to power AI applications, and the Vision Fund invested $500 million in the startup and launched a $1.5 billion tender to buy more stock from OpenAI employees last month.
News of SoftBank’s possible investment helped bolster a rise in Asian chip-related stocks including Advantest Corp. SoftBank’s shares were down 1% Thursday morning in Tokyo.