OpenAI raised $122 billion in its latest funding round, marking the largest in Silicon Valley's history. The investment, which values the company at $852 billion, includes major contributions from Amazon, Nvidia, and SoftBank, and expands access for individual investors through ARK Invest's funds.

OpenAI has transitioned its for-profit subsidiary into a public-benefit corporation, allowing Microsoft to acquire a 27% stake and pushing its valuation above $4 trillion. This change aims to facilitate fundraising and talent acquisition while addressing concerns over OpenAI's commitment to its nonprofit mission amid ongoing litigation.