Anthropic Hits $965 Billion Valuation as AI Investment Frenzy Intensifies

Anthropic has closed a $65 billion Series H funding round, pushing its post-money valuation to $965 billion and overtaking OpenAI as the most valuable private AI company. The May 28 round was led by Altimeter Capital, Dragoneer Investment Group, Greenoaks Capital, and Sequoia Capital, with co-leads including Capital Group, Coatue, D1 Capital Partners, GIC, ICONIQ Capital, and XN. Roughly $15 billion came from hyperscalers, including a new $5 billion commitment from Amazon. Strategic partners Samsung, SK hynix, and Micron also joined, alongside Blackstone, Brookfield, Baillie Gifford, D.E. Shaw, DST Global, and Fidelity.

Just three months earlier, Anthropic’s Series G valued the company at $380 billion. The leap reflects surging demand for its Claude models. Run-rate revenue crossed $47 billion this month, up from roughly $7 billion for all of 2025, as businesses embed Claude into workflows faster than expected. CFO Krishna Rao said the funds will support safety research, compute capacity, and product development, including tools like Claude Code and Cowork.

The capital will also back multi-gigawatt deals with Amazon Web Services and Google, as training and inference costs climb alongside revenue. But the round raises questions about whether private valuations this high can hold up under public market scrutiny. OpenAI, last valued around $840 billion to $852 billion, now trails. The two companies have absorbed over $220 billion in fresh capital since early 2025.

Analysts view the trajectory with cautious optimism. Enterprise adoption of Claude is real, but compute bills often match or exceed revenue growth. Anthropic now expects to turn cash-flow positive by 2028, a target that slipped as infrastructure demands grew. The company argues its focus on reliable, steerable systems gives it an edge over less cautious competitors.

Series H rounds are rare. Most venture-backed companies never reach them. Anthropic almost certainly won’t need a Series I; executives have signaled an IPO is coming in the next few months. OpenAI may also file a confidential prospectus soon. The pair could test public appetite for AI pure-plays before year-end.

Secondary markets had already priced Anthropic above $900 billion in recent weeks, with some trading platforms implying values near $1 trillion. The formal round locks in capital at terms that will matter when shares trade publicly. Early employees and investors stand to see paper gains that dwarf most technology exits in history.

The funding underscores a broader pattern: a handful of AI leaders now command the lion’s share of venture dollars. Investors bet that foundational models will power everything from software development to scientific discovery, accepting eye-watering burn rates today in hopes of market dominance tomorrow.

Risks remain. Regulatory pressure on AI safety is building. Geopolitical tensions could restrict access to advanced chips. Energy constraints may slow data center buildouts. And competition from open-source efforts or big tech’s in-house models could compress margins. Anthropic’s constitutional AI approach and emphasis on interpretability have won praise, but whether those traits translate into sustainable advantage at trillion-dollar scale is unproven.

Public markets will render final judgment. If Anthropic debuts near current private levels, it would rank among the largest tech IPOs ever. Success could open the floodgates for other AI companies. Failure, or even a modest step-down, might chill the entire sector. For now, the momentum feels unstoppable. The AI race has a new valuation leader. The real test lies ahead.