Anthropic PBC today announced that it has raised $13 billion in funding to support its artificial intelligence research and commercialization efforts.

ICONIQ, Fidelity Management and Lightspeed led the Series F round. They were joined by more than a dozen other institutional backers. Anthropic is now worth $183 billion post-money, or about triple the valuation it received after its previous raise in May.

The steep valuation increase reflects the company’s rapid sales growth. Anthropic started the year with annualized revenue of about $1 billion and has since seen that number jump to $5 billion. The AI provider disclosed today that Claude Code, a programming assistant it  introduced in February, accounts for more than $500 million of that revenue.

One of the models that Claude Code uses to answer developer questions is Anthropic’s flagship Claude Opus 4.1 algorithm. The AI recently set a new record on the SWE-bench Verified coding benchmark with a score of 74.5%. Gemini 2.5 Pro and OpenAI’s o3 achieved 67.2% and 69.1%, respectively.

Anthropic disclosed today that Claude Code usage has grown “more than 10x in just three months.” This jump occurred despite the fact that the company rolled out new rate limits in July. Customers of Anthropic’s top-end Claude Max plan can reportedly use Opus for 24 to 40 hours per month, while less capable algorithms may be used for longer.

The company’s installed base includes more than 300,000 business customers. According to Anthropic, the number of organizations that spend more than $100,000 annually on Claude has grown by a factor of seven over the past year.

“We are seeing exponential growth in demand across our entire customer base,” said Anthropic Chief Financial Officer Krishna Rao. “This financing demonstrates investors’ extraordinary confidence in our financial performance.”

Anthropic will use some of the funds to grow its international presence. The company didn’t specify how it plans to go about the task. One possibility is that it will introduce versions of Claude tailored for specific markets, which is the approach rival OpenAI has taken with its recently launched ChatGPT Go subscription.

Anthropic also plans to make investments in its AI safety research program. In March, the initiative produced two papers that shed new light on how large language models generate text and solve math problems. Anthropic hopes that visibility into the inner workings of LLMs will make it easier to verify the reliability of their safety guardrails. 

The company’s AI safety research could also help make Claude more competitive. One of Anthropic’s March papers contained findings on how LLMs apply knowledge learned in one domain to other domains. The ability to generalize concepts in this manner is a prerequisite to completing challenging reasoning tasks.

According to Anthropic, today’s funding round will also “expand our capacity to meet growing enterprise demand.” That suggests the company is planning to procure more graphics processing units. Nvidia Corp. recently started shipping its newest Blackwell Ultra GPU, which can perform some inference tasks 50% faster than its predecessor. 

Image: Anthropic