Bitcoin miners unplug $1.5B rigs for AI

TLDR

Some large public Bitcoin (BTC) miners have switched part of their fleets from hashing to AI, sidelining hardware worth about $1.5 billion as they chase high?performance computing revenue.

1. An estimated 75 EH/s of public miner hashrate, valued around $1.5 billion at $20 per terahash, has been taken offline or redirected toward AI workloads.
2. The pivot is driven by weaker Bitcoin mining economics and fast?growing AI and HPC revenue, which rose about 52% quarter over quarter for the miners reviewed.
3. Bitcoins network remains strong, but miners are becoming general compute providers, so watching hashrate, difficulty and miner earnings mix is increasingly important for users and investors.

Deep Dive

1. Hardware Scale And Dollars

A recent sector review of 12 public Bitcoin miners found they shed about 75 exahash per second (EH/s) of realized hashrate in the first half of 2026, primarily by redirecting sites and power toward AI infrastructure, rather than simply switching machines off. The analysis values that capacity at roughly $1.5 billion of mining rigs at an assumed $20 per terahash, excluding buildings, electrical systems and cooling, which adds further sunk cost to the shift.

These firms had just ramped up, spending nearly $5 billion on equipment and infrastructure in the prior reporting cycle and more than $3 billion on mining hardware in 2024, helping push Bitcoin into zetahash territory in 2025, according to Bitcoins Great Unplug analysis. Now they are writing down or reclassifying part of that buildout: about $1.1 billion in asset impairments and held?for?sale markdowns in early 2026, with companies like IREN and Cipher taking large charges tied to conversions of mining campuses into HPC data centers.

2. Why Miners Are Chasing AI

The same review reports that directly disclosed high?performance computing and AI revenue for these miners rose about 52% quarter over quarter, a sharp contrast with squeezed Bitcoin mining margins. For some operators, leasing compute for AI workloads now offers better cash flow than selling block rewards.

At the same time, financing and policy constraints make these pivots complicated. Lenders such as Socit Gnrale and SMBC are becoming more selective about data?center financing and MUFG has stepped back, while jurisdictions including New York, Massachusetts and Chicago have added permit pauses or extra approvals for hyperscale projects. That mix creates a capital?intensive, slower path into AI, but miners already own power hookups and industrial sites, which gives them a head start in repurposing infrastructure.

3. Network And Market Implications

The 75 EH/s reduction relates to public miners realized hashrate, not the entire Bitcoin network, which still operates at historically high levels. Many non?public or smaller miners continue to grow, so the impact on overall security depends on how total hashrate evolves, not just on this cohort.

However, large listed miners historically contributed a meaningful share of transparent capacity. Their retreat or reallocation can shift who earns block rewards, potentially increasing the relative share of private or less scrutinized operators. If AI returns stay structurally higher than mining returns, future hashrate growth could slow at the margin, making Bitcoin more sensitive to swings in energy prices, financing conditions and large?operator outages.

Confidence: moderate, because the numbers cover public miners but not the full global mining landscape.

Conclusion

Bitcoin miners unplugging or repurposing $1.5 billion of rigs for AI highlights a structural change in how hashpower is supplied, driven by tighter mining economics and strong demand for AI compute. For crypto users, the near?term takeaway is that Bitcoins security remains robust, but miner behavior now depends on broader infrastructure and AI cycles, so monitoring hashrate trends, miner earnings mix and regulatory pressure on data centers will matter more than in past cycles.