Spouse passed with joint accounts and will do I need to probate?

If the accounts were "joint with right of survivorship," 100% passes to the surviving account holder. If the accounts were "joint," 50% passes to the surviving account holder and 50% passes under the Will or, if there is no Will, according to the state's inheritance laws.   There may also be a need to probate (prove) the estate if there is something besides the accounts.