Anthropic, the artificial intelligence (AI) company behind the Claude models, is set to pay xAI, the Grok AI maker now merged with SpaceX, around $1.25 billion per month for access to computing infrastructure. The deal, which could rank among the largest AI compute agreements ever disclosed publicly, may exceed $40 billion by 2029.
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Explore NVDS for 2X short leverage on NVDAAnthropic and xAI Sign $40 Billion Compute Deal
Earlier this month, Anthropic and SpaceX-xAI announced a deal for 300 megawatts of compute capacity, equivalent to roughly 220,000 Nvidia GPUs. The agreement, disclosed in a recent SpaceX S-1 filing ahead of its expected IPO, gives Anthropic access to most of the compute output from the Colossus 1 data center near Memphis, Tennessee.
It also includes rights to future capacity at the planned Colossus 2 facility. Notably, the deal is intended to support scaling the Claude Pro and Claude Max models. Particularly, for high-throughput enterprise and research workloads.
Under the agreement, Anthropic will pay xAI $1.25 billion per month through May 2029. For the first two months, the AI firm will pay a discounted rate as infrastructure ramps up. Additionally, either party can terminate the deal with 90 days’ notice, according to the filing.
Overall, xAI could generate more than $40 billion from the agreement. The company also expects to enter additional similar services contracts in the future, according to the filing.
xAI to Monetize Idle Compute Capacity With Anthropic Deal
According to the S-1 filing, xAI noted that the arrangement will help it monetize “unused compute capacity” within its infrastructure. Before the deal, Colossus 1 reportedly operated at low usage after most training workloads shifted to the newer Colossus 2 facility. This left Colossus 1 as a high-cost asset generating limited returns.
At the same time, use of Grok, xAI’s AI assistant, has also declined, freeing up additional compute capacity. Leasing this infrastructure to Anthropic turns what was effectively a stranded asset into one of the largest computer contracts in AI history.
Furthermore, SpaceX has described the approach as part of a “dual monetization strategy” designed to create multiple revenue streams from its infrastructure investments. Meanwhile, for Anthropic, the deal reflects the growing demand for compute needed to power its expanding AI coding and enterprise products. If achieved, the company’s revenue for Q2 2026 is expected to exceed $10 billion.
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