SoftBank is in talks to invest in OpenAI, potentially deepening the relationship between the two companies that are already planning an artificial-intelligence infrastructure initiative.

OpenAI is in talks for an investment round to raise nearly $40 billion that would value the AI startup at up to $340 billion, the Wall Street Journal reported on Thursday.

A new investment from the Japanese conglomerate would be separate from the $100 billion tied to a project announced at the White House last week.

SoftBank Group Corp. is in discussions to invest as much as $25 billion in OpenAI in a move that would potentially make it the AI startup’s biggest backer, the Financial Times reported.

SoftBank is in talks to invest up to $25 billion in ChatGPT owner OpenAI, according to a person familiar with the matter, as the Japanese conglomerate continues to expand into the sector.