FGFA fighter is an upgraded T50 to be deployed by 2022.

The Sukhoi/HAL Fifth Generation Fighter Aircraft (FGFA) or Perspective Multi-role Fighter (PMF) is a fifth-generation fighter being developed by India and Russia. It is a derivative project from the PAK FA (T-50 is the prototype) being developed for the Indian Air Force. FGFA was the earlier designation for the Indian version, while the combined project is now called the Perspective Multi-Role Fighter (PMF).

The completed PMF will include a total of 43 improvements over the T-50, including stealth, supercruise, advanced sensors, networking and combat avionics. Two separate prototypes will be developed, one by Russia and a separate one by India. The aircraft is expected began testing in India in 2014, with introduction into service expected by 2022.

The Russian and Indian air forces each plan to purchase about 250 FGFAs, at an estimated $100 million per fighter for an $25 billion total, in addition to the development costs. By October 2012, India had cut its total purchase size from 200 to 144 aircraft. India's initial investment had grown from $5 billion to $6 billion, and the estimated total program cost had grown to $30 billion.

http://nextbigfuture.com/2015/01/fgfa-fighter-is-upgraded-t50-and-should.html