The major investment deal aims to build infrastructure for AI, led by Japanese giant SoftBank and ChatGPT-maker OpenAI. Tesla and X chief Elon Musk as well as Anthropic head Dario Amodei have also expressed doubts about the plans. "It is not clear that any entity has this amount of money to invest, even over five years," Meta's chief AI scientist Yann LeCun said in an interview on Thursday.