SoftBank Plans $500 Million Investment in OpenAI's Record $150 Billion Valuation Round

Japanese technology and investment conglomerate SoftBank Group Corp has agreed to commit $500 million to OpenAI's blockbuster $6.5 billion financing round, marking billionaire founder Masayoshi Son's first direct equity backing of the ChatGPT creator. The investment, executed through SoftBank Vision Fund 2, cements the Tokyo-based firm's participation in an unprecedented capital raise that values OpenAI at approximately $150 billion.

While SoftBank previously backed OpenAI competitor Perplexity AI and made substantial investments across enterprise robotics and semiconductor infrastructure, Son had long sought a direct anchor stake in Sam Altman's flagship artificial intelligence powerhouse. The deal represents a symbolic and financial milestone in Son's personal campaign to position SoftBank at the epicenter of Artificial General Intelligence (AGI) and Artificial Superintelligence (ASI).

Masayoshi Son's Strategic Bet on Artificial Superintelligence

SoftBank's participation comes as the conglomerate pivots aggressively back into deployment mode following years of balance sheet defense and cautious asset monetization. Bolstered by massive equity gains from its 90% ownership stake in UK chip designer Arm Holdings, SoftBank possesses substantial cash reserves to fund high-conviction frontier AI bets.

Son has repeatedly proclaimed that ASI—artificial intelligence possessing capabilities ten thousand times superior to human intelligence—will emerge within the next decade. Backing OpenAI provides SoftBank with valuable technological insight and alignment with the planet's preeminent generative AI research laboratory.

“Artificial superintelligence represents the single greatest technological leap in human civilization. Partnering with industry leaders like OpenAI aligns directly with SoftBank's long-term vision.” — SoftBank Group Corporate Investment Division

Synergies with Arm and the Global AI Compute Ecosystem

Market analysts anticipate substantial operational synergies between OpenAI and SoftBank's broader ecosystem, particularly Arm's energy-efficient microprocessor designs. As generative AI workloads transition from training to widespread edge inference in smartphones and robotics, low-power chip architectures designed by Arm will be critical for global deployment.

The $500 million commitment will formally close alongside primary contributions from Thrive Capital, Microsoft, and Nvidia. For SoftBank shareholders, the move demonstrates Son's unwavering determination to remain a dominant financier of the artificial intelligence revolution, despite macroeconomic volatility and shifting venture valuations.

Sources

• SoftBank Group Corp
• Tokyo Stock Exchange