The Vitalik Buterin PhD Fellowship in AI Existential Safety is for PhD students who plan to work on AI existential safety research, or for existing PhD students who would not otherwise have funding to work on AI existential safety research. It will fund students for 5 years of their PhD, with extension funding possible. At universities in the US, UK, or Canada, annual funding will cover tuition, fees, and the stipend of the student's PhD program up to $40,000, as well as a fund of $10,000 that can be used for research-related expenses such as travel and computing. Fellows will also be invited to workshops where they will be able to interact with other researchers in the field.