Yes, it’s true that IIIT Hyderabad has better placements than IITs. For instance, IIIT Hhyderabad's average package for 2022 stood at INR 32 LPA whereas the top IIT Bombay average package stood at INR 23.26 LPA. Apart from the top IITs, most of the IITs have the highest package INR 40–60 LPA.
In IIIT Hyderabad 2022 placements, the highest package of INR 74 LPA was offered.
The placement scenario of IIIT Hyderabad is highly comparable to top IITs and here even the average students get placed with great packages. So, ultimately, it’s up to you which one to go for IIT or IIIT Hyderabad.