OpenAI CEO Sam Altman reportedly invested $1 million in Rain AIOLIVIER DOULIERY/ GettyOpenAI agreed to pay startup company Rain AI $51 million for when its chips are released, per Wired.OpenAI chief Sam Altman reportedly invested $1 million of his own money in the company. Saudi Aramco's VC firm Prosperity7 also invested but sold its sell shares, Bloomberg reported. OpenAI signed a letter of intent to spend $51 million on chip startup Rain AI, Wired reported.