Bitcoin miners pivot to AI as capital spending hits $30.7 billion

Bitcoin mining companies are aggressively pivoting toward artificial intelligence (AI) and high-performance computing (HPC), though massive capital expenditures are currently outstripping revenue. According to BlocksBridge Consulting, 15 publicly listed Bitcoin miners and AI data center companies spent $30.7 billion on capital assets during their latest 2026 reporting periods, a 42.6% increase over 2025 totals.

Despite this spending, the financial return remains disproportionate. Nine comparable miners spent $5.11 billion on capital assets in the first half of 2026 while generating only $341.2 million in reported AI and HPC revenue, representing a 15-to-1 capex-to-revenue ratio. While AI-related revenue grew 52% quarter-on-quarter in the second quarter, the transition requires expensive infrastructure upgrades, including substations, cooling, and networking.

Sphere 3D is among the firms repositioning its infrastructure following a combination with Cathedra Bitcoin. The company is evaluating its existing power capacity to capture higher economic value from AI workloads compared to cryptocurrency mining. Sphere 3D is specifically looking at converting a 15 MW facility in Hopkinsville, Kentucky, and is considering modular GPU clusters to reduce development timelines.