Deloitte on Monday announced a deal to bring Anthropic’s artificial intelligence assistant Claude to more than 470,000 of its employees around the globe. 

The rollout will be Anthropic’s largest enterprise deployment ever, building on a partnership that the two companies first unveiled last year.

Deloitte, which offers consulting, tax and audit services, is one of the 300,000 business customers Anthropic has amassed in the four years since the startup’s founding. 

“We are both investing a significant amount in this partnership, whether that’s financial or whether it is just simply the engineering resource that we’re going to put into this as well,” Paul Smith, Anthropic’s chief commercial officer, told CNBC in an interview.  

The companies declined to disclose the financial details of the deal.

Deloitte will build out and deploy different Claude “personas” for different groups of employees, ranging from accountants to software developers, over the next several months. Staffers can also get support from specialists within Deloitte’s Claude Center of Excellence, which is designed to help teams deploy and benefit from the technology more quickly.

Ideally, exposing Deloitte employees to AI will help them reap the personal benefits like productivity gains, while also inspiring them to think about how the technology could be used to transform other industries and sectors, said Ranjit Bawa, Deloitte’s U.S. chief strategy and technology officer.

“Our clients obviously want to know: ‘Are you using it as well?’ So we can advise them better, we can be more credible,” Bawa said. “That’s why we said we got to start with ourselves as we continue to have our clients reimagine their future.”

Deloitte’s Claude deployment, which will take place across more than 150 countries, comes as Anthropic has been working to beef up its global presence.

The startup said in September that it would triple its international workforce this year, and brought on a new executive, Chris Ciauri, to spearhead that expansion.

That same month, Anthropic announced its latest AI model, Claude Sonnet 4.5, and that it closed a $13 billion funding round at a $183 billion post-money valuation. The Amazon-backed startup has had to keep pace with rivals like OpenAI and Google for customers.

“We’re still pretty busy,” Smith said. “But it’s good busy.”

WATCH: Anthropic launches Claude Sonnet 4.5, its latest AI model