Anthropic Partners With Amazon to Rival OpenAI

Amazon has agreed to invest up to $25 billion in Anthropic, the artificial intelligence startup known for developing the Claude family of large language models, as part of an expanded partnership focused on AI infrastructure and cloud computing services.

The investment, announced on April 20, 2026, includes an initial $5 billion in cash, with up to an additional $20 billion contingent on the achievement of certain commercial milestones. This brings Amazon’s total investment in Anthropic to $13 billion when combined with the $8 billion previously invested in recent years.

Anthropic, founded in 2021 by former OpenAI researchers, has positioned itself as a leading rival to OpenAI, the developer of ChatGPT. The company specializes in building AI systems with a focus on safety and steerability, offering its Claude models as alternatives to OpenAI’s GPT series.

As part of the agreement, Anthropic has committed to spending more than $100 billion on Amazon Web Services (AWS) technologies over the next 10 years. This commitment includes the use of current and future generations of Amazon’s custom AI chips, specifically the Trainium series, which are designed to compete with Nvidia’s offerings in the AI accelerator market.

Anthropic said it has secured up to 5 gigawatts of computing capacity for training and deploying its Claude models on AWS infrastructure. The company plans to bring nearly 1 gigawatt of Trainium2 and Trainium3 capacity online by the end of 2026.

The deal mirrors a similar arrangement Amazon made with OpenAI just two months prior, in which the e-commerce giant invested up to $50 billion and struck a $100 billion cloud services agreement. That OpenAI deal valued the company at a $730 billion pre-money valuation during a $110 billion funding round.

Amazon’s latest investment in Anthropic values the AI startup at $380 billion for the initial tranche. The structure of the deal reflects Amazon’s broader strategy of pairing equity investments with long-term cloud commitments, effectively using its AWS infrastructure as both a financial and technological lever in the competitive AI landscape.

Amazon CEO Andy Jassy emphasized the strategic importance of custom silicon in the partnership, stating that Anthropic’s commitment to run its large language models on AWS Trainium for the next decade reflects progress made together on custom chip development to meet customer needs for generative AI technology and infrastructure.

The investment comes amid Amazon’s plans to spend approximately $200 billion on capital expenditures in 2026, with the majority allocated to AI infrastructure including data centers, chips, and related hardware to support its cloud and AI services divisions.

Anthropic’s increased funding and cloud commitment follow a period of growing demand for its Claude models across enterprise and consumer applications. The company has previously received backing from other major technology investors and has been discussed in venture capital circles as a potential candidate for future funding rounds that could value it at $800 billion or more.