Bitcoin (BTC) Miners Cut 56 EH/s in H1 2026 AI Pivot

56 EH/s Goes Dark

Listed Bitcoin (BTC) miners unplugged an estimated 56 EH/s of hashrate during the first half of 2026 — a 15% contraction, steeper than the roughly 10% decline across the entire Bitcoin network — and most of that power is not returning to Bitcoin mining. According to WuBlockchain, drawing on an analysis of public miners, the capacity was largely redirected into AI and high-performance computing (HPC) retrofits rather than simply retired, and the pivot is already visible in earnings: directly disclosed HPC and AI revenue at comparable miners rose 52% quarter over quarter in Q2, and for the fastest movers it was the first quarter in which HPC hosting or AI cloud income exceeded their shrinking mining revenue.

The per-megawatt-hour economics explain the pull. HPC hosting produced a median of about $174.90 per MWh — nearly identical to the $179.13 that Bitmain's latest-generation Antminer S23 Hyd. earns per MWh — but hosting income is locked in through multi-year contracts, often with power costs passed to tenants, while mining revenue floats with the Bitcoin price, network difficulty and fees in the aftermath of the halving. Full-stack AI operators earn far more per unit of electricity: IREN's AI cloud runs at roughly $807/MWh, HIVE at $924, WhiteFiber at $958 and Bitdeer at about $1,213, though those figures bundle GPU, networking and scheduling value. The AI cloud median of roughly $941/MWh is more than five times the S23 Hyd.'s yield and over eight times the S21 Pro's $113.45. Sustained HPC revenue across six comparable providers ranged from $86 to $300 per MWh, with landlord-style operators clustering in a narrow $140-$200 band. Zcash mining on the Z15 Pro sits in between at an estimated $585.61/MWh — roughly three times the newest Bitcoin ASIC — though it exceeded $700/MWh just over a week earlier, underscoring how volatile that alternative remains.

The transition is not cheap. The 14 companies in the comparison spent $18.6 billion in a single quarter, PwC estimates global AI datacenter construction may absorb $31.6 trillion by 2050, and CoreWeave alone deployed $6.42 billion during the quarter.

35 EH/s Committed to Exit

CoinShares' second-quarter 2026 proof-of-work mining report, published Tuesday, concludes that the shift is largely irreversible: Bitcoin's price recovery is unlikely to bring back operators that have already paid steep termination costs or signed decade-long leases. The firm counts at least 35 EH/s of hashrate already committed to leaving listed miners' mining businesses — about 4.7% of the network's roughly 750 EH/s. Core Scientific paid nearly $42 million to terminate a contract covering 15 EH/s of next-generation miners ahead of schedule, and multiple operators have signed AI and HPC datacenter leases running longer than 15 years.

The exit paths are explicit. Keel, formerly Bitfarms, stopped mining entirely in June; IREN intends to complete its exit by the end of 2026; Cipher could depart by end-2027; and TeraWulf is winding down its remaining roughly 145 MW of mining power capacity. Margins are the driver: CoinShares estimates AI infrastructure now yields about $1.5 million in profit per MW versus roughly $500,000 for mining — a threefold gap on the same power and datacenter footprint. Q2 was punishing. The average cash cost of producing one bitcoin ran near $75,500 against a quarter-end price of about $58,400, and June's average hash price sank to a record low of $27.70 per PH/s per day amid post-halving competition. Conditions have since eased — with Bitcoin recovering to around $77,000, hash price has rebounded to roughly $38 per PH/s per day, returning most miners above cash breakeven. Still, the report argues that operators who have committed capacity to AI clients for the long term will not pivot back, describing AI not as a short-term hedge but as the longer-term use for their datacenter assets; renewed mining investment is likelier at flexible names such as Riot, MARA, HIVE and Bitdeer. Readers tracking the market in real time can follow live spot and futures prices on Bitget.

Hashprice Recovery Meets Locked Leases

Read together, the two datasets frame a structural repricing of miner electricity rather than a cyclical capitulation. The load-bearing document is the CoinShares report itself, which states plainly that Bitcoin's recovery is unlikely to reverse the AI transition for operators that have paid termination fees or leased capacity out for 15 years or more. Our reading: the 56 EH/s already offline in H1 plus the 35 EH/s committed to exit mean close to a tenth of the network's hashrate is migrating toward contracted infrastructure revenue, permanently shrinking the pool of elastic hashrate that responds to price spikes. The variable to watch is whether the hash-price recovery to roughly $38 per PH/s per day stalls the exit pipeline at flexible operators like Riot and MARA, or whether locked-in AI leases keep absorbing capacity regardless of where Bitcoin trades.