When did the ipad pro 12.9 come out?
No context provided
When did the 1st Generation 12.9-inch iPad Pro come out?
November 11, 2015
No context provided
When did the 2nd Generation 12.9-inch iPad Pro come out?
June 13, 2017
No context provided
When did the 3rd Generation 12.9-inch iPad Pro come out?
November 7, 2018
iPad Pro
https://en.wikipedia.org/wiki/iPad%20Pro
iPad Pro is a premium edition of the iPad tablet computers developed by Apple. It initially ran iOS,[12] but was later switched to a derivation of the same equivalent that is optimized for the iPad, iPadOS.
IPad Pro
It is larger than all previous iPad models and the first iPad tablet to feature LPDDR4 RAM.
IPad Pro
The first iPad Pro, which is larger than all previous iPads, was released on November 11, 2015, and the 2nd generation iPad Pro came out on June 13, 2017. Then on November 7, 2018, the 3rd generation 12.9-inch iPad Pro came out.    