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

In a significant leadership shift with strategic implications for the clean energy and artificial intelligence sectors, OpenAI CEO Sam Altman has officially stepped down as chairman of the board of advanced nuclear startup Oklo.

Altman’s resignation opens up the opportunity for future deals between OpenAI and the nuclear-energy startup. Oklo shares fall after hours.