OpenAI valuation tops $500B as AI funding surges in Q3 2025

OpenAI’s rise to a reported $500 billion valuation and a fresh wave of multibillion-dollar rounds for AI startups highlighted a surge in technology investment this quarter, as investors poured roughly $97 billion into global venture capital in the third quarter of 2025 and directed nearly half of that into artificial intelligence. The funding drives and corporate launches this quarter concentrated capital in a small group of firms even as questions about privacy, market concentration, and the wider social effects of AI accelerated.

The quarter’s financing was dominated by a handful of companies. Anthropic led with a $13 billion round, xAI closed about $5.3 billion, and Europe’s Mistral AI raised around $2 billion. Data from PitchBook and Crunchbase show AI-focused companies captured approximately 46 percent of global VC funding in Q3, and AI investment for 2025 has exceeded $190 billion year to date. The United States accounted for the largest share of those flows.

OpenAI’s valuation followed a secondary share sale that included institutional investors, and the company said it earned $4.3 billion in revenue in the first half of 2025. Executives described continuing heavy...