Bitcoin miners sign $70B in AI contracts as mining margins shrink

Bitcoin miners have signed more than $70 billion in AI and high-performance computing contracts, redirecting power from block production to data centers as margins shrink.

Fifteen to 20 percent of the global mining fleet is operating at a loss, CoinShares estimated in March, as hashprice near $32 per petahash per day sits below breakeven for older hardware.

Mining difficulty has fallen 19.9 percent from its November 2025 peak of roughly 156 trillion to 126.23 trillion, while network hashrate declined about 12 percent from above one zettahash per second to approximately 868 exahashes per second. Publicly traded miners sold more than 32,000 BTC in the first quarter of 2026, exceeding their combined sales for all of 2025, according to Bitcoin Magazine Pro data. Bitcoin traded near $63,100 on July 31, down approximately 47 percent over 12 months.

The pivot is creating a new valuation framework for mining stocks, where AI contract backlog, power capacity, and hyperscaler relationships matter as much as bitcoin holdings. According to projections cited by Crypto Briefing, AI revenue could represent more than 70 percent of total revenues for publicly listed miners by late 2026.

Hut 8's $26.6B AI portfolio leads the shift

Hut 8 signed a second 15-year lease on July 20 for 352 megawatts at its Beacon Point campus in Texas, raising its total contracted AI portfolio to $26.6 billion. Core Scientific followed with an AMD partnership anchored by 15-year agreements covering approximately 530 megawatts, with total leased customer capacity reaching roughly 1.1 gigawatts and more than $24 billion in potential contracted revenue.

TeraWulf's transition is already generating revenue. The company reported $21 million in AI and high-performance computing hosting revenue in Q1 2026, surpassing its bitcoin mining revenue of less than $13 million for the first time. HIVE Digital announced a $2.55 billion AI super factory project near Toronto designed to host more than 100,000 GPUs.

Cipher Mining signed a $5.5 billion, 15-year agreement with AWS to supply 300 megawatts of AI-ready power, with operations expected to begin in 2026. The deal reflects a broader trend: miners sit on permitted power capacity and existing sites that hyperscalers need for high-performance computing.

Mining stocks diverge from bitcoin's price

The AI pivot has broken the historical relationship between mining stocks and bitcoin's price. A basket of bitcoin mining equities gained 56 percent during the early months of 2026 while bitcoin fell 17 percent, according to research cited by industry analysts. Investors are now valuing these companies on their power contracts, real estate, and AI revenue potential rather than on bitcoin production.

The divergence creates an ironic dynamic for bitcoin's network security. Every megawatt that moves from mining to AI hosting reduces the hashrate protecting bitcoin's blockchain. The difficulty adjustment compensates automatically, but the trend raises questions about long-term security implications if mining becomes a marginal activity for what were once dedicated mining companies.

The counterargument is that AI revenue makes these companies more financially resilient, which ultimately benefits the bitcoin network. A mining company with $26 billion in contracted AI revenue can afford to keep mining bitcoin through price downturns that would force a pure-play miner to shut down entirely.

For crypto investors, the pivot represents one of the most significant structural shifts in the mining sector's history. Companies like Cipher Mining are essentially hedging against bitcoin price volatility by diversifying into enterprise computing infrastructure. The AI contract backlog, power capacity, and relationships with hyperscalers now matter as much as, if not more than, the bitcoin holdings on their balance sheets.

This article is for informational purposes only and does not constitute investment advice.