Anthropic has closed a massive $13 billion Series F funding round, giving the artificial intelligence startup a post-money valuation of $150 billion, Reuters reported. The deal places the Claude maker among the most highly valued private technology companies in the world.

The raise underscores investor appetite for leading AI firms even as questions persist about how quickly the sector can turn rapid growth into durable profits. Anthropic has become one of the most closely watched players in the race to build advanced AI systems, competing with other major companies in the field.

Large late-stage rounds have become a defining feature of the AI boom, with capital pouring into companies that promise broader enterprise adoption, stronger model performance and new commercial uses. Anthropic’s latest financing reflects that continued rush of money into the sector.

Reuters said the round closed at a valuation that ranks among the biggest ever seen in venture capital. The size of the deal also signals that investors remain confident in the long-term market for AI tools, despite rising scrutiny over costs, regulation and competition.