OpenAI is in advanced talks to buy electricity from Sam Altman-backed fusion startup Helion Energy. The move indicates that OpenAI is serious about using fusion energy to meet massive power demands. The agreement involves a guaranteed portion of Helion's production, initially 12.5%, and potentially increasing this to 50 gigawatts by 2025. Helion, which is also backed by SoftBank, Peter Thiel's Mithril Capital and Facebook co-founder Dustin Moskovitz, is on the verge of "scientific breakeven" - a milestone where the company's fusion process generates more energy than it consumes. However, conditions such as the selection of a site for Helion to produce the energy are still to be fulfilled.