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 (TYO:9984) is in talks to lead a funding round of up to $40 billion in OpenAI, valuing the ChatGPT maker at $300 billion, sources said. If finalized, this would mark a record-breaking private funding

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.