The film Bahubali: The Beginning that got released in July, 2015 is considered to be the most expensive Indian films ever.

Baahubali: The Beginning is the most expensive production in the history of Indian cinema to date. The film was shot using Arri Alexa XT camera marking Rajamouli’s first film using digital camera and the principal photography began at Rock Gardens in Kurnool on 6 July 2013.

Source: https://en.wikipedia.org/wiki/Baahubali:_The_Beginning