SoftBank is in talks to invest up to $25 billion in OpenAI, potentially becoming its largest backer. The deal is still under negotiation, according to a source who requested anonymity due to confidentiality. The deal remains under negotiation, with SoftBank founder Masayoshi Son reportedly pushing for a larger stake after investing $500 million in OpenAI’s last funding round. The startup has historically relied on Microsoft as its primary investor but is shifting toward a for-profit model to secure more capital. The AI market is projected to hit $1 trillion in a decade.