(Reuters) -Japan's SoftBank is in talks to invest as much as $25 billion into ChatGPT maker OpenAI, the Financial Times reported on Wednesday.

SoftBank could invest $15 billion to $25 billion directly into Microsoft ( MSFT )-backed OpenAI on top of its commitment of more than $15 billion to Stargate, the report said, citing multiple people with direct knowledge of the negotiations.

Stargate is a joint venture by Oracle, OpenAI and Softbank that plans to invest $500 billion to help the United States stay ahead of China and other rivals in the global AI race.

"The talks are ongoing and the amount that SoftBank could invest in primary equity into OpenAI is a moving target," a source told the FT.

OpenAI and SoftBank did not immediately respond to request for comment.