We may now know roughly how much money SoftBank and OpenAI are contributing toward Stargate, OpenAI's massive data center project.

Masayoshi Son founded SoftBank in 1981. It has invested millions in some of Silicon Valley's biggest tech companies.

Despite investing almost $14 billion in OpenAI and using the startup’s AI models for its next-generation cloud services, Microsoft was mentioned only as a technology partner in a joint venture called ...