Anthropic Raises $65 Billion at $965 Billion Valuation, Surpassing OpenAI as Most Valuable AI Startup
Anthropic closed a $65 billion Series H funding round on May 28, 2026, reaching a post-money valuation of $965 billion. The round was co-led by Altimeter Capital, Sequoia Capital, and several other major institutional investors. The company also reported a run-rate revenue of $47 billion and launched its Claude Opus 4.8 model focused on agentic tasks and advanced coding.
Anthropic announced on May 28, 2026, that it had closed a $65 billion Series H funding round, bringing its post-money valuation to $965 billion. The raise positions Anthropic as the most valuable private artificial intelligence company in the world, ahead of OpenAI.
The round was co-led by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital. Additional co-leads included Capital Group, Coatue, D1 Capital Partners, GIC, ICONIQ, and XN. Institutional investors including Blackstone, Fidelity Management and Research Company, General Catalyst, Insight Partners, and T. Rowe Price also participated.
The round included $15 billion in previously committed investments, with $5 billion coming from Amazon. Anthropic has also secured major infrastructure agreements: partnerships with Amazon for up to five gigawatts of compute capacity, with Google and Broadcom for five gigawatts of next-generation TPU capacity, and with SpaceX for GPU access in its Colossus data centers. Chip suppliers Micron, Samsung, and SK hynix joined the round to support Anthropic's memory and storage needs.
At the time of the announcement, Anthropic reported a run-rate revenue of $47 billion. The company said the new funds will go toward safety and interpretability research, expanded compute capacity, and scaling its product offerings including Claude Code and Claude Cowork.
The funding coincided with the release of Claude Opus 4.8, a model focused on agentic tasks, advanced coding, and self-correction capabilities.
The raise drew attention to the scale of enterprise AI costs. TechCrunch reported that one client incurred a $500 million bill in a single month due to a lack of usage controls on Claude AI, highlighting the need for cost-management frameworks as companies move from AI experimentation to production deployment.
Anthropic has not announced a specific IPO timeline, though the company's valuation and revenue trajectory have fueled speculation about a public offering in 2027.
