Odaily Planet Daily News: In its Bitcoin mining report released today, research and brokerage firm Bernstein rated Riot Platforms, CleanSpark, IREN and Core Scientific as "outperform", while Marathon Digital was rated as "market perform". The evaluation is based on five key indicators: production and computing power, operational and energy efficiency, electricity, computing power costs and artificial intelligence strategy. Core Scientific leads in computing power costs and AI strategy, while CleanSpark and IREN perform well in energy efficiency. Although Riot lags behind slightly in production and efficiency, it makes up for it through electricity points and improved production efficiency. Marathon has improved its operating efficiency by switching to a self-operated mining model.