Quoting SpaceX S-1

Simon Willison's Blog News

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SpaceX's S-1 filing reveals a $1.25 billion per month cloud services agreement with Anthropic for compute capacity on COLOSSUS and COLOSSUS II through May 2029, supporting training of Grok 5.

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Cached at: 05/20/26, 10:39 PM

# A quote from SpaceX S-1 Source: [https://simonwillison.net/2026/May/20/spacex-s1/](https://simonwillison.net/2026/May/20/spacex-s1/) 20th May 2026 > We have the ability to use compute resources to support our proprietary AI applications \(such as Grok 5, which is currently being trained at COLOSSUS II\), while also providing access to select compute capacity to third\-party customers\. For example, in May 2026, we entered into**Cloud Services Agreements with Anthropic PBC**\(“Anthropic”\), an AI research and development public benefit corporation, with respect to access to**compute capacity across COLOSSUS and COLOSSUS II**\. Pursuant to these agreements, the customer**has agreed to pay us $1\.25 billion per month**through May 2029, with capacity ramping in May and June 2026 at a reduced fee\. The agreements may be terminated by either party upon 90 days’ notice\. —[SpaceX S\-1](https://www.sec.gov/Archives/edgar/data/1181412/000162828026036936/spaceexplorationtechnologi.htm),highlights mine

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