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

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

OpenAI CEO Sam Altman is stepping down as chairman of nuclear startup Oklo. The move gives Oklo, which is developing advanced nuclear reactors, more flexibility to potentially explore partnerships with OpenAI or other hyperscalers,