Invest1 publisher3 min readPublished
Core Scientific paid $41.9 million to cancel 15 exahashes of new mining chips
With CoinShares putting the second-quarter cash cost of a bitcoin at about $75,500 against a $58,400 price, public miners are switching off rigs they own and paying cash to cancel the ones they ordered.
The Investor · Invest desk

What happened
- Keel, the operator formerly known as Bitfarms, switched off Panther Creek, Scrubgrass and Sharon on June 29 after closing Moses Lake in April, and will book no mining revenue in the third quarter.
- Cryptopolitan reports that Core Scientific handed Block's Proto division $41.9 million to cancel about 15 exahashes per second of next-generation 3nm mining chips.
- Average monthly network hashrate fell from about 1,066 EH/s in the first quarter to 1,004 in the second and 940 in the third, per Hashrate Index.
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Why it matters
- exposure The sector's balance sheets now depend on tenant payment schedules: more than $70 billion of AI and HPC contracts has been announced, and Core Scientific's own portion is described as expected contract revenue.
- constraint A converted site cannot go back to hashing if bitcoin recovers, so the operators have traded price optionality for a fixed rental stream.
- contradiction CoinShares' fourth-quarter 2025 loss-per-coin figure is roughly $7,000 larger than its own cost and price inputs support, which matters for anyone sizing how deep the mining shortfall actually ran.
- decision Cipher Digital's guidance turns exit into a scheduled capital allocation choice: no further mining capex, and every megawatt earmarked for a tenant instead of a rig.
Cancelling the order cost Core Scientific about $2.79 million for each exahash per second it declined, on roughly 15 EH/s, and that block is a little over 1.5% of the 940 EH/s the network averaged in the third quarter [1][2][11]. Cryptopolitan reports the cancelled hardware as the most efficient ever built [5]. A company that expected hashing to pay would take delivery and retire older machines instead. Cipher Digital said the same thing on a slower timetable, telling investors it will not spend on mining capex and expects to be out of the business by the end of 2027 [7].
CoinShares put the second-quarter weighted-average ex-tax cash cost of a bitcoin at about $75,500 against a $58,400 close, a gap of $17,100 a coin before tax, depreciation or interest [14][3]. Keel sold 1,085 coins at an average of $69,100, around $75 million, which was $6,400 below that cash cost and 18% above where the quarter ended [4][4][5]. It plans to liquidate the remaining 1,861 before year-end, worth about $109 million at the quarter-end price [4][6]. The wind-down took its gross margin to negative 285% as retired rigs were depreciated at speed [3].
One figure in the report does not survive subtraction. CoinShares gives the fourth-quarter 2025 cash cost as roughly $79,995 with bitcoin between $68,000 and $70,000, and says operators were down about $19,000 a coin; those inputs give $10,000 to $12,000 [15][7].
Hyperscale Data's Michigan deal prices power more legibly than any sector-wide contract total. More than $1.2 billion over ten years for 20 megawatts is $6 million per megawatt-year [9][8]. The option on another 32 megawatts lifts the ceiling to $3 billion, which values the incremental power at about $5.6 million per megawatt-year, some 6% under the first block [9][9]. The company did not name the tenant beyond calling it a California neocloud provider [9]. Chief executive William Horne said the shutdown lets the company focus the site's power and infrastructure on the incoming customer [10].
In my view these are now power landlords carrying tenant credit risk, and the conversion runs one way. Wolfie Zhao of The Energy Mag said, "Once that multi-gigawatt power infrastructure has been retrofitted to AI or HPC colocation, there is no turning back" [19]. Ethan Vera, chief operating officer of Luxor, said "Miners everywhere are being revalued as energy and AI infrastructure" [13]. The counter-thesis is that the revaluation rests on money not yet received: the sector's $70 billion-plus of AI and HPC agreements includes Core Scientific's own line of more than $14 billion in expected contract revenue [17]. Peter Schiff wrote on X that AI is not a tailwind for bitcoin but a rival, competing for the same capital, electricity and data center space [18].
What would break the thesis is a tenant that cannot fund a decade of payments, because a converted site with scrapped rigs and a sold treasury has no fallback revenue at all. Public miners have already sold more than 15,000 BTC since their treasuries peaked [16]. The permitting picture constrains the new business as well as the old: CoinShares counts at least 225 moratoriums or restrictions on data-center development across 30 states, 151 of them still in force [20].
What to watch
- Whether Keel discloses proceeds from the remaining 1,861 coins and what it does with the cash before year-end.
- Whether Hyperscale Data's California tenant exercises the 32-megawatt option, and whether the tenant is named at that point.
- The next CoinShares report, and whether weighted-average cash cost falls back under the bitcoin price.