Question: is obito the sage of six paths?
Answer: Madara said this when Obito became the Jinchuuriki of the Juubi: Now he is equal to The Sage of Six Paths. So yes, Obito was in Sage Mode after he had become the Jinchuuriki. But Sage Mode abilities of Obito are far more dangerous than that of any one else due to the massive chakra of the Juubi.