Blackstone is increasing its investment in artificial intelligence startup Anthropic, lifting its total stake to around $1 billion as the company’s valuation climbs to approximately $350 billion.
A source familiar with the matter said the world’s largest alternative asset manager is committing an additional $200 million as part of Anthropic’s ongoing funding round.
The investment underscores sustained investor appetite for leading AI companies, driven by expectations of rapid commercial adoption and long-term growth across multiple industries.
Anthropic, which develops the Claude family of AI models, is backed by major technology firms including Amazon and Alphabet, further strengthening its position among top generative AI developers.
Strong Demand For Generative AI Leaders
The latest funding round places Anthropic among the most highly valued private companies globally, reflecting intense competition among investors to secure exposure to advanced AI technologies.
Blackstone and Anthropic declined to comment on the investment, which remains private, according to the source.
The funding comes shortly after Anthropic launched its new flagship model, Opus 4.6, marking another step in the company’s push toward enterprise and consumer markets.
Anthropic said the model delivers improved reasoning, coding performance and complex text generation capabilities compared with earlier versions.
Market Reaction And Industry Impact
Opus 4.6 was designed to handle longer tasks with greater reliability, while delivering notable gains in areas such as software development and financial analysis.
The launch coincided with a selloff in traditional software stocks, as investors reassessed the potential for generative AI to disrupt established Business models.
Shares in software firms across Europe and the United States fell last week amid concerns that AI tools could automate tasks that have historically driven pricing power and revenue growth.
Analysts increasingly view the software sector as particularly exposed, with rapid improvements in AI accelerating fears of structural change across the industry.

