OpenAI secures $8.3 billion in funding at $300 billion valuation

OpenAI has closed a new $8.3 billion funding round, according to people familiar with the transaction, in a deal that values the company at $300 billion. The round was led by Thrive Capital and Microsoft, underscoring continued investor appetite for artificial intelligence companies despite a crowded and increasingly expensive market.

The fundraising comes as OpenAI remains one of the most closely watched names in the sector, with its products and partnerships helping shape the broader commercial push into generative AI. A valuation of $300 billion places the company among the most valuable private firms in the world.

The size of the round also highlights how much capital continues to flow into AI infrastructure, model development, and related software. For backers, the bet is that demand for advanced AI tools will keep rising across consumer and enterprise markets.

While the deal reflects strong confidence in OpenAI’s growth prospects, it also raises the stakes for the company as it faces mounting competition, higher expectations, and scrutiny over how quickly the AI boom can translate into durable profits.