Anthropic Overtakes OpenAI to Become the Most Valuable Artificial Intelligence Startup
San Francisco, Thursday, 28 May 2026.
Anthropic has surpassed OpenAI with a valuation nearing $1 trillion. This historic market shift, driven by enterprise demand, generated a massive $1 billion windfall for early investor Zoom.
A Monumental Valuation Shift
On May 21, 2026, Anthropic announced a staggering $65 billion Series H funding round, officially elevating its valuation to $965 billion [1]. This milestone firmly dethrones OpenAI, which had previously set the high-water mark for the industry with an $852 billion valuation in March 2026 [1][3]. The financial leap is extraordinary even by Silicon Valley standards; Anthropic’s valuation has surged by 153.947 percent since its $380 billion pricing just months prior in February 2026 [1][2]. Heavyweight institutional investors, including Altimeter Capital, Dragoneer Investment Group, Greenoaks Capital Partners, and Sequoia Capital, led the charge, cementing Anthropic’s position at the pinnacle of the generative AI ecosystem [1][2].
This rapid capital appreciation is deeply anchored in exceptional revenue growth and enterprise adoption [GPT]. By May 21, 2026, Anthropic reported a staggering $47 billion revenue run rate, a sharp increase from a $30 billion run rate seen earlier in the year and a massive leap from the $9 billion to $10 billion recorded at the close of 2025 [1][2]. Much of this financial momentum is driven by the company’s Claude Code assistant, which