• Anthropic raised $3.5 billion in Series E funding, led by Lightspeed Venture Partners, bringing its total funding to $18.2 billion.
  • The company’s latest AI model, Claude 3.7 Sonnet, enhances query responses and simplifies AI usability by eliminating complex model selection.

AI startup Anthropic has secured a massive $3.5 billion in Series E funding, bringing its post-money valuation to $61.5 billion.

The round was led by Lightspeed Venture Partners, with participation from Bessemer Venture Partners, Cisco Investments, D1 Capital Partners, Fidelity Management & Research Company, General Catalyst, Jane Street, Menlo Ventures, and Salesforce Ventures.

This latest investment pushes Anthropic’s total funding to $18.2 billion, according to Crunchbase.

“With this investment, Anthropic will advance its development of next-generation AI systems, expand its compute capacity, deepen its research in mechanistic interpretability and alignment, and accelerate its international expansion,” the company stated in a blog post.

The funding comes on the heels of Anthropic’s latest AI model, Claude 3.7 Sonnet, a hybrid reasoning model designed to refine query responses.

The company is working to simplify AI usability, aiming to eliminate the need for users to navigate complex model selections.

Anthropic's business has seen rapid growth, with its annual revenue run rate surpassing $1 billion last year.

That figure has climbed by 30% in 2025, driven by API revenues and AI chatbot subscriptions. However, the company expects to burn through $3 billion this year as it continues aggressive AI development.

To enhance profitability, Anthropic has introduced new tools, subscription tiers, desktop and mobile applications, and AI-powered “agents.”

The company has also strengthened its ties with Amazon, which invested $4 billion in November.

Amazon is working with Anthropic to optimize its custom AI chips, Trainium, and integrate Anthropic’s models into the new Alexa+ assistant.

Founded in 2021 by former OpenAI VP of Research Dario Amodei and several ex-OpenAI employees, Anthropic continues to position itself as a safety-first alternative in the AI landscape.

Edited by Annette George