Sam Altman's exit from Oklo's board makes it easier for OpenAI to potentially strike a power deal with the energy startup.

Oklo says its microreactors, called Aurora, have smaller and simpler designs that will range from 15 megawatts to as much as 100 megawatts or more.

Oklo said Tuesday that OpenAI CEO Sam Altman was stepping down as chairman of its board and indicated a partnership with the artificial-intelligence company could be on the horizon. Altman, who has served as chairman since 2015,