Anthropic has closed a $13 billion Series E funding round, marking one of the largest private investments in the artificial intelligence sector to date. The round was led by Amazon and Google, underscoring continued investor appetite for advanced AI tools and infrastructure.

The company, best known for its Claude chatbot and enterprise AI products, said the new capital values it at $150 billion. The deal adds to a wave of enormous funding rounds that have pushed top AI firms into a new league of private-market valuations.

The latest investment gives Anthropic more room to expand its model development, compute capacity, and commercial partnerships as competition intensifies across the AI industry. It also reflects how major technology firms are still betting heavily on generative AI despite mounting questions about cost, regulation, and long-term profitability.

For the broader market, the raise signals that investor confidence in frontier AI remains strong even as companies face pressure to prove that rapid growth can translate into durable business returns.