If you were born in 2000, you are 25 or 26 years old in 2026 (depending on whether your birthday has passed). Born in 2000 age: 26 years.
Born in 2000: you are 25 years old before your birthday in 2026, and 26 years old after. Generation: Generation Z.
If born in 2000, you are 25 or 26 years old in 2026.
Born in 2000: Gen Z.