Artificial intelligence startup Anthropic is looking to dramatically expand its office presence in Manhattan.

The company behind chatbot Claude is on the hunt for between 250K SF and 450K SF, Bloomberg reported, citing anonymous sources.

The move would be a significant upgrade from its space at 155 Avenue of the Americas. Anthropic occupies between 10K SF and 20K SF in the building on a lease that is set to expire this year, according to CompStak.

Anthropic declined to comment to Bloomberg and didn't immediately respond to Bisnow’s request for comment.

The company raised $13B in September at a $183B valuation. It said in November it planned to spend $50B to build out AI infrastructure in the U.S., starting in Texas and New York.

Reports have also emerged about Anthropic growing its San Francisco footprint. The firm is in talks to take over the entirety of 300 Howard St., formerly known as 199 Fremont St., the San Francisco Chronicle reported late last year. DivcoWest and Blackstone purchased the vacant 420K SF property for $111.3M in April with plans to market it as part of the city’s “AI Alley.”

AI tenants contributed to the immense office activity in New York City in 2025. Through the first nine months of the year, such companies leased 486K SF of offices in Manhattan, up from 414K SF in all of 2024 and 265K SF in 2023.

A deal with Anthropic could equate to nearly all of AI companies' leasing activity last year, but it would be a drop in the bucket compared to the larger market. In 2025, Manhattan’s office market celebrated its strongest year in more than a decade with nearly 43M SF of deals, a 20% year-over-year increase, according to Savills.