JetPack 4.6 or JetPack 3.3.1 ?
Jetson TX1 continues to be supported by JetPack 4.x releases, built on the L4T r32 codeline. JetPack 3.3.1 was the final JetPack 3.x release for Jetson TX1, built on the L4T r28 codeline. L4T r28 sustaining releases will continue to be made as deemed necessary. (L4T 28.3.2 was the most recent release.)