Anthropic has reached a $9.1 billion AI data center computing agreement with Bitcoin miner Riot Platforms, expanding its push to secure long-term capacity for growing Claude demand. Riot said it will provide 191MW of computing power at its Rockdale, Texas campus under a contract running through June 2048, with two optional five-year extensions that could lift total revenue to as much as $16.1 billion. Riot's stock rose 25% in after-hours trading to $24.40 after the news, according to BIT(bit.com) market data. The deal underscores how crypto miners are repurposing power-rich sites for AI and cloud infrastructure as they diversify beyond Bitcoin mining. Anthropic has recently signed several large computing agreements, including a $10 billion contract with infrastructure startup Volta Infra Holdings and a nearly $45 billion capacity purchase from Elon Musk's xAI in May to ease pressure from rising customer demand.