SoftBank is reportedly considering a historic $25 billion investment in OpenAI, which could surpass Microsoft's stake and position SoftBank as the ChatGPT maker's largest investor.

SoftBank is in talks to inject up to $25 billion directly into OpenAI, positioning the Japanese tech conglomerate to become the ChatGPT maker's largest financial backer, according to initial reporting from the Financial Times on Wednesday evening.

The Japanese stock market has moved higher in three straight sessions, gathering almost 1,200 points or 3 percent in that span. The

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 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.

Japan's SoftBank is in talks to invest $15-25 billion in OpenAI in a deal that would make it the ChatGPT-maker's biggest financial backer, the Financial Times reported on Thursday.

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.