Anthropic Overtakes OpenAI as Most Valuable AI Start-up

Anthropic became the world's most valuable artificial intelligence start-up on May 28, 2026, after overtaking its primary competitor, OpenAI [1, 2, 3].

This shift in market leadership signals a changing tide in the AI race, as investors pivot toward Anthropic's specific approach to model development and safety. The valuation leap reflects the immense capital required to scale next-generation large language models.

The rise in value followed a Series H funding round in which Anthropic raised $65 billion [1, 4]. This infusion of capital pushed the company's post-money valuation to a range between $900 billion ^[1] and $965 billion [2, 4].

This new valuation surpasses that of OpenAI, which was previously valued at $730 billion ^[1]. While most reports indicate this trillion-dollar trajectory, some conflicting data suggests a different scale. One report indicated Anthropic might raise $10 billion at a $350 billion valuation ^[5].

The company, based in Silicon Valley, has seen its market position accelerate as it competes for dominance in the global AI sector [1, 2]. The massive funding round allows Anthropic to expand its computing infrastructure and research capabilities, which are essential requirements for maintaining a lead over other AI labs.

Industry analysts said that the competition between these two entities now dictates the pace of AI deployment across the U.S. and international markets ^[1]. The scale of the Series H round is one of the largest in the history of the technology sector, highlighting the high stakes of the current generative AI boom [1, 4].