I was told by someone from the architecture firm that it would be 419 feet tall, but that was 2 years ago before some changes were made to the design.
The 388 foot height came from a stacking plan we saw in one of the presentation PDF packets that were listed with a bunch of renderings. Btw, these renderings were showing the old design for the project when they were still planning those large white residential towers with the funky windows. That 388 foot number, though, only showed the office tower to the flat part of the roof. At the time when we saw those heights, they hadn't shown that glass wedge above the main roof. So I think it will most likely be a bit taller than 419 feet.
We should know for sure once the building elevations are released in the site plan. It's still going through the approval process now.
https://www.austintexas.gov/devrevie...erRSN=11128724