SoftBank is in discussions to invest between $15 billion and $25 billion in OpenAI, the owner of ChatGPT, according to a source familiar with the matter. The move is part of the Japanese conglomerate’s ongoing efforts to expand its footprint in the AI sector. Some of the investment may go towards funding OpenAI’s commitment to Stargate, a joint venture between Oracle, OpenAI, and SoftBank.
The Stargate project aims to secure up to $500 billion in investments to keep the U.S. ahead of China and other global competitors in the AI race. SoftBank has already committed $15 billion to Stargate and is exploring additional financing options for the project. The investment talks with OpenAI are still in early stages, according to the source.
Earlier reports indicated that SoftBank is considering a total investment of $40 billion into both Stargate and OpenAI, including borrowing up to $18.5 billion in financing, secured by its publicly-listed assets. The venture was unveiled at a White House event last week, attended by U.S. President Donald Trump, SoftBank CEO Masayoshi Son, OpenAI CEO Sam Altman, and Oracle Chairman Larry Ellison.
However, SoftBank’s stock price has taken a hit following a market selloff triggered by the rise of DeepSeek, a Chinese AI startup that introduced a free AI assistant developed at a fraction of the cost of its U.S. competitors. This shift has raised concerns about the sustainability of business models that rely on expensive AI technology and contributed to a decline in SoftBank’s shares, which were down 1% in morning trading on Thursday.
Despite this, SoftBank remains committed to strengthening its position in the AI sector. The company already holds a $1.5 billion stake in OpenAI, which was valued at $157 billion in its most recent funding round. SoftBank and OpenAI have yet to comment on the reported investment discussions.
