Anthropic is now the world's most valuable privately held technology company. The San Francisco AI lab closed a $65 billion Series H funding round on Thursday at a post-money valuation of $965 billion, moving past OpenAI, which raised $122 billion in March at an $852 billion post-money valuation. For the broader AI industry, which had treated OpenAI's market leadership as something close to a fixed point, Thursday's announcement represents a concrete shift in the competitive standing of the two firms.
The Round and Its Investors
The Series H was led by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital. Additional participants include Capital Group, Coatue, D1 Capital Partners, Baillie Gifford, Blackstone, Brookfield, D.E. Shaw Ventures, DST Global, and Fidelity Management and Research. The roster spans growth-stage technology specialists, large institutional asset managers, and sovereign-adjacent funds that rarely appear together on the same startup cap table.
The closing valuation almost triples Anthropic's $380 billion figure from February 2026, when the company completed a separate financing as part of its continuing expansion. Anthropic has described this round as the last private raise before its anticipated public offering, which the company has targeted for October 2026. For more on the specific funding round structure and use-of-proceeds breakdown, see our earlier coverage.
Key Facts
- Series H raise$65 billion
- Post-money valuation$965 billion
- OpenAI valuation (March 2026)$852 billion
- Anthropic revenue run-rate (May 2026)$47 billion annualized
- Revenue run-rate 3 months prior$14 billion
- Annual revenue, 2025$10 billion
The Revenue Engine Behind the Valuation
The premium over OpenAI rests on a revenue growth story that few private companies have matched at this scale. Anthropic disclosed Thursday that its annualized revenue run-rate crossed $47 billion in May 2026, up from $14 billion in February and roughly $10 billion for all of 2025. The company describes the underlying growth rate as approximately ten times annually for three consecutive years.
Claude Code is central to that trajectory. The company's agentic coding tool, which launched in late 2025, crossed $1 billion in annualized revenue within six months of its debut and now contributes more than $2.5 billion in run-rate revenue on its own. Earlier this month, Ramp's AI Index showed that Anthropic had crossed OpenAI in business-to-business adoption for the first time, with 34.4% of tracked businesses using Claude against 32.3% for OpenAI. The gap narrowed and then flipped over the space of roughly a year, driven largely by Claude Code's penetration into software engineering teams.
Enterprise and API revenue remain the primary growth contributors. Consumer subscriptions have grown as well, though the rate trails enterprise by a meaningful margin. Anthropic has not disclosed specific retention or churn figures, but the pace of new enterprise contracts signed this year, across pharmaceutical companies, financial institutions, and major consulting partnerships, suggests the pipeline has depth beyond early adopters.
"We plan to use the funding to advance our safety and interpretability research, expand compute to meet growing demand for Claude, and scale the products and partnerships our customers rely on." Anthropic statement, May 28, 2026
What the Capital Buys
Anthropic said it would deploy the new funds across three areas. Safety and interpretability research comes first, consistent with the company's Responsible Scaling Policy and its commitments to evaluate frontier models against capability thresholds before deployment. Compute expansion is second: demand for Claude has grown faster than available inference capacity, and the company has signed multi-billion-dollar agreements, including a deal with SpaceX's Colossus 1 data center in Memphis, to close the gap. Product development for its partner network, which includes major consulting firms, enterprise software integrations, and sector-specific tooling, forms the third pillar.
The announcement arrived the same day Anthropic released Claude Opus 4.8, its latest general-purpose model. That update raised the company's agentic coding benchmark from 64.3% to 69.2% on SWE-Bench Pro, surpassing GPT-5.5's 58.6%, and introduced Dynamic Workflows for large-scale enterprise agent tasks. The dual-track release, a major fundraise alongside a model improvement, is consistent with how Anthropic has managed its public calendar this year: tying product milestones to business announcements to sustain narrative momentum with both developers and investors.
The Competitive Picture Ahead of IPO
Both Anthropic and OpenAI are preparing for public offerings with different arguments to make. OpenAI commands a larger installed base of free users and stronger recognition among general consumers. Anthropic's case centers on enterprise revenue concentration, faster growth from a smaller base, and a model portfolio that has closed benchmarking gaps with OpenAI's flagship offerings in domains that matter most to software developers and knowledge workers.
The valuation lead may not hold once both companies are subject to public market scrutiny. Enterprise AI spending is concentrated enough that a few large contract decisions could shift quarterly results materially. But Thursday's round, and the investor list behind it, signals that a significant portion of institutional capital currently reads Anthropic's trajectory as the more durable of the two. Public market investors will reach their own conclusions, most likely before the end of 2026.
