Okla. Const. art. VII, § 4

The appellate jurisdiction of the Supreme Court shall be co-extensive with the State and shall extend to all cases at law and in equity; except that the Court of Criminal Appeals shall have exclusive appellate jurisdiction in criminal cases until otherwise provided by statute and in the event there is any conflict as to jurisdiction, the Supreme Court shall determine which court has jurisdiction and such determination shall be final. The original jurisdiction of the Supreme Court shall extend to a general superintending control over all inferior courts and all Agencies, Commissions and Boards created by law. The Supreme Court, Court of Criminal Appeals, in criminal matters and all other appellate courts shall have power to issue, hear and determine writs of habeas corpus, mandamus, quo warranto, certiorari, prohibition and such other remedial writs as may be provided by law and may exercise such other and further jurisdiction as may be conferred by statute. Each of the Justices or Judges shall have power to issue writs of habeas corpus to any part of the State upon petition by or on behalf of any person held in actual custody and make such writs returnable before himself, or before the Supreme Court, other Appellate Courts, or before any District Court, or judge thereof in the State. The appellate and the original jurisdiction of the Supreme Court and all other appellate courts shall be invoked in the manner provided by law.