The tech billionaires have a rocky history, and Musk's comments about funding for the project, which could attract $500 billion prompted a pointed response from OpenAI leader Altman.
OpenAI, SoftBank Group, Abu Dhabi, and Oracle are among the players in a joint venture meant to pour hundreds of billions more into AI data center funding.
The new joint venture between OpenAI, Oracle, SoftBank and other partners intends to build the infrastructure needed to greatly expand artificial intelligence in the U.S.