Unprecedented divergent synthesis of gem-difluorovinylacetic acid and glutaric acidderivativesfrom α-CF3 alkenes with formate as the carbonyl source was disclosed. The reaction can undergo selective mono- or triple C-F bond cleavage by simply switching the photocatalyst and hydrogen atom transfer (HAT) catalyst under visible-light-induced conditions at room temperature. Foramte acts as both the C1